User-CentredDesign

Children with allergies

Group 61Bianca Liefhebber 1232304Mathias (M.P.) Verheijden 1234306Martijn ten Brinke 1241106Batug Karaman 0977922

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0 Table of contents

0. Table of contents 2

1. Week 1 32. Week 2 63. Week 3 84. Week 4 105. Week 5 136. Week 6 157. Week 7 188. References 229. Appendix I 2310. Appendix II 2611. Additional Appendices 28

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1 Week 1The usersThe main users of this product are children with food allergies (age 8 to 12), and their parents.

Capabilities children: children age 8 to 12 are able to convey what prod-ucts they like and have a taste of their own. They are also able choose differ-ent products, but tend to go for nice looking packaging over quality of the product.Limitations children: age 8 to 12 are often not in charge of their own food consumptions and might not know what they are allergic to exactly. They mostly rely on their parents to do gro-ceries and make meals. As a result of this, children with food allergies rely on their parents to get the correct products for them, and do often not understand what their allergy means.Capabilities parents: they know whether the children are allergic to specific types of food or not, and de-cide for the children what they can and can’t eat. Limitations parents: the parents don’t really know what the children like to eat because this changes very often. They can also make mistakes when they are picking food for their children, so there is a possibility that the parents buy a product that their kid is allergic to. Another problem parents have, is that it’s very difficult to explain to a child that they can’t eat something because of an allergy.

Additional stakeholdersStores: stores are involved because the directing of customers to or away from certain products influences the sales of those products.Suppliers: suppliers of specific al-lergy-sensitive products like peanut butter or dairy products could be neg-atively affected by a design that steers people away from their products.

Tasks & activitiesProcess of doing groceries with a child that’s allergic:1. Parent thinks of meal they want to make.2. Searches for recipes that contain no products the child is allergic to.3. Makes a list of products to buy.4. Goes to the store and enters.5. Searches for the right products that contain no allergens.6. Pays, goes home and makes the meal.

BottlenecksThe bottlenecks in the process of doing groceries are mainly point 5 (searching for the right products that contain no allergens) and also point 2 (searching for recipes that contain no products the child is allergic to). Point 2 takes a lot of time because most rec-ipes don’t include what allergens are in the meal.

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As a result, the parent has to remem-ber themselves what allergens are in what products and discard any reci-pes with those products.Point 5 takes a lot of time because stores usually don’t take people with food allergies into account. Products that do and don’t contain allergens are scattered throughout the store, and the parent needs to individually check every products ingredients to see if it contains allergens.

Physical, social, organisational and technical environmentPhysical:The physical environment is the store and the home of the family. The store is a very noisy, crowded and light place. It’s usually room tempera-ture (a little below near the coolers and freezers).

Social:If parents need advice for aller-gen-free products, they need to ask an employee for help. Supermarket em-ployees are often not trained for these kinds of specific questions, resulting in wrong answer, or no answer at all.The older children in the target group (11 and 12 years old) sometimes buy product by themselves. For these chil-dren, it is hard to understand which products they can buy, and they’re often too embarrassed to ask an em-ployee. People are often prone to buying products on impulse1), which might be a problem when people with allergies need to check every label.

Organisational:Stores (especially supermarkets) often have a manager who’s responsible for the local branch. They have a lot of

employees who carry out simple tasks like stocking shelves and working be-hind the cash desk. These employees can be approached with questions about the products, but they rarely know anything about it.

Technical:Depending on the kind of product we design, different technologies are needed. For example, an electrical device will need power. Stores and supermarkets usually don’t have pow-er outlets near the products. But a low powered screen, like one from a simple calculator can also run on solar power.

Experience goalsDesirable aspects• Helpful: The main desirable aspect is that the design helps children with allergies (together with their parents) pick out food they can eat.• Satisfying/enjoyable: The design should be easy to use and understand for both children and parents. Also, children should see it as an extra in-stead of a restriction.• Fun: Since it is a parent AND chil-dren centered design, it should be fun in order to get the attention of the chil-dren which will accelerate the learning process.• Stimulating/motivating: Stimulating children to think about their allergies more actively and preparing them for shopping on their own.• Informative: People with allergies are often focussed on what they can’t eat, instead of what they can. Some foods they can’t eat, have surprising alternatives most people don’t know of.

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Undesirable aspects• Dangerous: Because people with allergies will be relying on the design, it should be absolutely faultless to pre-vent accidents from happening.

Childish: The design should promote autonomy and stimulation. Making it too simple or childish could result in the target group not taking it seriously.Boring: In order to make the users use the design it should be enjoyable, otherwise if a design is boring it will be hard to teach the children and use it.Frustrating: The design should be able to show the required information right away. People who are shopping food don’t have the time to dig in to menus to finally find out they can’t eat some-thing.

Contextualised definitions of compo-nents of usabilityEffectiveness: How accurate can the design, based on the user’s input, determine whether the consumer can eat a product or not.• Mistakes that the design can make: 0 in order to overcome bigger health issues.• The majority of the adult users should be able to use the system cor-rectly the first time (children less so, due to the big difference between 8 and 12 year old children)

Efficiency: The total time it takes for a user to interact with the design.• Time to complete shopping: no lon-ger than normal shopping time for people without allergies (so around 5 - 15 min)• The time to get to the information about the product: 1 - 10 sec• Time for a child to learn how the process works: preferably within the first session of use, so 5 - 15 min• Time to initialise the design (process allergies of user): checking all food allergies should be done carefully, so this should take around 10 - 20 min• Number of key presses on daily ba-sis: one for assignment to customer, one for assignment of product, one for paying

Satisfaction: The feeling that the de-sign works properly and the user can rely on the design.• Most customers should spend less time shopping than before product was introduced• The majority of children should learn from at least one product what aller-gens it contains (that they are allergic to)Customers need to feel ‘in control’ of the product

Storyboard (Mathias)

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2 Week 2Interview GoalThe purpose of this interview is:• Getting to know how people decide what to eat and how they buy their products.• Getting to know how children are involved in this process.• Getting to know whether children should be taken into account while making a design.

Final Interview Questions• What allergy does your child have?• How do you decide what meals to cook, regarding the allergy?• How do you choose products for that?• Do you check products for allergens at home or in the store?• What are the difficulties of checking the products for allergens?• How much time does this checking take per product?• Have you ever accidentally bought products your child can’t eat? How did that happen?• How often do you try new recipes?• Are they difficult to find? And why?• Does your child know about his/her allergy?• Does your child pay attention to his/ her allergy while eating something?• What is the biggest problem with doing groceries for a child with an allergy?

Persona Skyler RossPersonal ProfileSkyler has an 11 year old child togeth-er with her husband, to whom she has been married for the past 21 years. For the first years of her child’s life she didn’t notice anything special except for the fact that her kid got sick some-times when they ate certain types of food. She didn’t suspect anything behind this.When her child, Chris, was around the age of 6, she and her husband started to notice that the reactions to the food got worse and they went to the doctor for a medical check. From this check they concluded that their kid had a severe form of food allergy.

For the following years they were very careful with what to give Chris to eat and every time Skyler went shopping she had troubles with the etiquettes on the packages, because the letters were way too small to read quickly and comfortably.Due to this problem, she sometimes makes mistakes and buys the wrong products for her child. Especially when she is in a hurry. But after a lot of experience in the supermarket her shopping trip got way more efficient. The only struggle she meets right now is that some products change their in-gredients from time to time, and then they sometimes contain allergens. Especially when companies change the ingredients of a product.

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Background• 45 year old woman• Lives together in a family• Educated• Two children• Is a housewife• Wants relief in her hectic life

Attributes• Self described as active and caretaking• Very social• Likes to appear clever• Never wants to pay full prices• Has basic technology skills

Customer needs• Fast shopping routine• Easy to understand• Clear instructions• Quick overview• Not overly present• Fits in daily routine

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3 Week 3Assignment ARequirementsFunctional:• Description: The product shall not take more time processing ingredients of groceries than the time ittakes to normally check the etiquette.• Fit criterion: No longer than 30 seconds.• Customer satisfaction: 2

Look and feel:• Description: The product shall be attractive to audiences of 8 -12, and to adults.• Fit criterion: More than half of both children and parents should be excited to use the product.• Customer satisfaction: (child) 4, (adult) 3

Ease of use:• Description: The product shall be easy to carry while doing groceries.• Fit criterion: It should roughly way the same as a smartphone and should easily fit in the user’s hand.• Customer satisfaction: 3

Ease of learning:• Description: The product shall be easy to understand on first try for adults.• Fit criterion: The interface should be the same as Android or IOS, the two most used mobile interfaces.• Customer satisfaction: 4

User experience:• Description: The user will feel aided in their food-choice by the product.• Fit criterion: The product gives in- formation about the food, and gives an advice on whether the user should buy it.• Customer satisfaction: 4

Performance:• Description: The product shall re- duce the time spent on the process of checking products for allergens• Fit criterion: It should reduce the time by an amount where the user notices the difference.• Customer satisfaction: 4

Assignment BWhat are perceptual issues? (What does this mean for the design?):• Readability (size of text)• Color (color blindness, contrast)• Brightness display• Size of product• Ambiance and style• Temperature

Will the product be used frequent-ly? (learnability/memorability curve?)• It will be used frequently, so a more extensive learning curve would be preferable when it means the prod- uct has better memorability.

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What advance knowledge must the user possess? (What does this mean?)• Know how to read (and know the language)• Knowledge of how to use scanners• Basic supermarket skills• Basic knowledge of how to interact with technical appliances• Knowledge of what allergies the user has

What actions does the product need that some users might not be able to take? (Design?)• The user needs to be able to see or interact with the products (so for children it would be difficult to see/ reach the top shelf)• The user needs to be able to navi gate the store

Assignment CMapping:• Good mapping: Position of the speaker and voice receiver on a phone. When a phone is placed natu-rally in the hand and then held to one’s ear, the speaker is at ear height, and the voice receiver is at the height of the mouth.• Bad mapping: USB sticks. It is frus-trating to have to make a 50/50 guess of whether the right side is up every time you need to plug a USB stick into something.

Affordance (phone):• “…” icon means: options/there is more information here.• Outlines around a word mean: click-able/you can fill something in.• “Play” triangle/gif symbol over still frame means: this is a video/gif, you can watch it by clicking the screen.• Home button: it’s at the position of the thumb, and it’s a button that looks like it can be pressed.

Constraints (phone):• Physical constraint: A phone charger can’t go in the wrong way.• Logical constraint: Slight tilting or dragging of the screen when touched means: you can’t scroll further be-cause there is nothing more to see. You are at the end of the page.• Cultural constraint: Grey text or a grey symbol means: this function is off or not able to turn on.

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4 Week 4Assignment AGeneric descriptionA design that can indicate and convey to the user whether a product con-tains ingredients that are allergens for a specific person with a food allergy.

Functionsmemorise allergiesrecognise different allergiestell whether an allergen is present in a productindicate this to the customer

Tasks being able to identify all products in the storeaccessing the product databasecomparing users input of allergy with product databaseindicate to the user whether a product contains allergensgive information about the productgive information about the allergy

Required info designwhat allergens are in every product (database)what the customer is allergic toinformation about the allergy

Required info userwhat kind of allergens he/she is aller-gic tobeing able to readknowing how to handle a scanner / being familiar with self scanning in stores

Design concept:The concept is a design that can indi-cate and convey to the user whether a product contains ingredients that are allergens for a specific person with a food allergy.

To do this the design has to have ac-cess to a database of known allergies, and the allergens that trigger a reac-tion with those allergies. It also has know the ingredients and possible trace elements of allergens of all prod-ucts in the store. It needs to be able to combine these two things to form a conclusion of whether the user is allowed to have the product. Then the design has to convey this information to the user (including children 8 - 12).

The user needs to know what he or she is allergic to. They also need to be able to read to interact with the product. It is also important that they are familiar with self scanners in su-permarkets and know how to handle them.

Assignment DQOC AnalysisInteraction question: How can the user know whether a product contains allergens that are harmful to them?

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Interaction design options:• Display of all allergens on price tag• Display of relevant allergens on scanner• Rearrange store layout to indicate and group specific allergies

Criteria:• Effectiveness - clear for the user• Efficiency - not time consuming• Learnability - intuitive in use, also easy to use for children• Helpfulness - supports the user in choosing the right products• Flexibility - can adapt easily to multi- ple allergies• Trustworthiness - customers are able to trust the product• Pleasure - fun to use, for children and adults• Feasibility - technically feasible• Costs - the concept shouldn’t be too expensive

Matrix (next page):Grading scale: 1 - 5 (1 = worst, 5 = best)Weight scale: 1 - 3 (1= worst, 3 = best)

Conclusion:As seen on the next page, option 2 ended up being the optimal choice by quite some points. It is by far the most personalised, feasible, adaptable and easiest to use of the options. It scored the highest on the most important points: Effectiveness and Helpfulness. It also seems the most reasonable, be-cause a supermarket wouldn’t want to change their layout, and getting inter-active price tags for every product is very expensive.

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Criteria Weight Option 1 Option 2 Option 3

Effective-ness

3 3: same as nor-mal price tags

4: has better vis-ibility than price tags

3: useful, but complicated

Efficiency 2 3: takes reading time

4: quickly shows data

2: time con-suming for customer and employees

Learnability 2 4: familiar / same as normal

3: needs some getting used to

4: needs some getting used to different shop-ping routes

Helpfulness 3 2: doesn’t add much

4: clearly indicates which products to choose

2: makes a little bit clearer where you can get your prod-ucts

Flexibility 2 2: not person-alised

3: sometimes it can be hard to change the aller-gies on the com-puter

1: can’t adapt at all / not per-sonalised

Trustworthi-ness

2 4: trustworthy / same as normal

4: seems very trustful as it is a personal service

2: difficult for employees to keep track of so not safe

Pleasure 1 2: not much fun 3: sort of fun to use because of interaction

2: same as nor-mal but then a little bit more organised

Feasibility 2 4: already exists (mediamarkt price tags)

3: easy to add al-lergy information to product, but hard to connect to scanner

2: easy to alter store layout, but hard to cat-egorise aller-gies

Costs 1 2: expensive be-cause of neces-sary quantity of interactive price tags

4: rather expen-sive due to the development of the system

4: expensive for employees to keep track

Sum - 53 65 43

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5 Week 5MDF prototype scannerTo get a sense of the look and feel of the scanner, an MDF prototype was built. Instead of an integrated screen a holder for a phone was built, to allow the interface to be displayed by an app.

First interfaceThis first interface was a quick draft made with HTML. As seen in the pictures below, you can see that

the design does not have a clear design language and is not based on commonly used interface styles like Android or IOS. Apart from that there are no actual products which does not make it feel like a real experience for the user. All of these aspects were improved in our second prototype as seen in Chapter 7.

(Task descriptions in Appendix week 5)

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Login Screen Shopping Cart

Safe Product

Unsafe Product

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6 Week 6Assignment A(See Appendix week 5: Individual task description, Bianca)

Assignment DCognitive WalkthroughTask: user scans products for personal allergies and pays

Action sequence (interface Mathias)Questions: 1. Do they know what they need to know?2. Is the control for the action visible?3. Is there a strong link between the control and the action?4. Will the user understand the feed back?

Answers:Scan bonuscard1. Yes2. Yes3. Yes4. YesScan product1. Yes2. Yes3. Yes4. YesCheck if product is safe1. Yes2. Yes3. Yes4. Yes

Delete products1. Yes2. Yes3. Yes4. No (action isn’t added to app yet)Choose alternatives if product is un-safe1. Yes2. Yes3. Yes4. YesGo back to overview of products1. Yes2. No (back-button isn’t added to screen yet, but normal phone back-button does work)3. Yes4. YesBuy products1. No (no clear indication that the scanner needs to be placed in a hold-er)2. No (no “pay” button or indication mentioned above)3. No (it isn’t intuitive to put the scan-ner down when you still need to do actions with it, so text needs to be added)4. Yes

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Heuristic Evaluation1. Visibility of system statusThe system doesn’t display it’s sta-tus for things like, battery charge and loading time, but this isn’t necessary because you can also see the small time it needs to load as a delay. When you click on a button it changes col-our so the system will tell you that you have pressed the button.

2. Match between system and real world. The scanner icon can be im-proved because it is a landscape pic-ture instead of one that represents a scanner. The crosses that represent the removal of a product from the shopping bag are clear. The button for scanning is mapped on a unlogical place, it should be placed way lower for it to be logically placed. the home button is also poorly mapped because it is hard to recognize due to the fact that the icon is our logo, and not a symbol of a home.

3. User control and freedomThe user is very limited to the specific tasks that the system wants the user to do. The system offers the option to return to the previous screen if one handling takes to much time. This can be done by pressing the home button. The app is usable with different font sizes, but these aren’t installed yet.

4. Consistency and standardsThe system is very consistent because of it’s simple and clean use of sym-bols. the symbols that indicate wheth-er a product is safe to eat are also very clear and standard

5. Error preventionThe system doesn’t really prevent er-rors because it doesn’t let you confirm that you want to remove an item from your shopping list.

6. Recognition rather than recallMost of the buttons have very clear labels, except for the home button and the button where you can check the product information, there should be better icons for those buttons, like a home symbol and a information symbol. The controls are very obvious because it is a touchscreen interface. Because of this the link between con-trols and actions is also very clear.

7. Flexibility and efficiency of useThe system doesn’t give experience users shortcuts, because it is already very simple and quick to use. The nov-ice users are guided by the simplicity of the interface but if they don’t get it, there isn’t an extra help. the user isn’t able to use a recent history of instructions, because there aren’t any instructions.

8. Aesthetic and minimalist designThe design of the interface is very minimalistic, and properly organised due to the list structure. Colours are used in a functional way because when a product is bad for someone, the colour of the product becomes red in the list. but the interface has problems with legibility in the light blue areas because the contrast of light blue and white isn’t great and thus hard to read.

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9. Recognize and recover from errorsThere aren’t any error messages, so it’s not possible to make them clear. But if the allergen warning counts as an error message, it is pretty clear, and it even displays alternative ways to solve the problem. So that is a proper error recovery.

10. Help and documentationThe system is very clear in use by it-self, so the user doesn’t need any help to handle it.

(Other Cognitive walkthrough and Heuristic evaluation are in Appendix week 6)

Assignment EPrototype revisionPoints of improvement (Heuristic eval-uation):• Change the mapping of the return and scan button• Add a checkout button• Change the main colour• Use different symbols at the but- tons

• Points of improvement (Cognitive walkthrough):• Add working delete button for prod ucts• Add back-button to go back to last screen• Add pay-screen to indicate to the user that the scanner needs to be placed in the holder to pay

Assignment FDifferences Heuristic evaluation and Cognitive walkthroughHeuristic evaluations are more fo-cused on the user and the look and feel of the interface. For example: the points for improvement were color and style related, like the color of the text in comparison to the background. A Cognitive walkthrough focuses more on the technical aspects and the effect the system has on the user. The points for improvement were techni-cal aspects like the buttons and expla-nations on screens.

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7 Week 7Redesign prototypeBased on the feedback from the Cog-nitive walkthroughs and Heuristic eval-uations the interface was revised and redesigned. First of all, the design implemented both the Android and IOS design lan-guage. Android and IOS are by far the most used mobile interfaces, so by im-plementing their design style, the user will recognize what standard buttons will do.

Apart from the design language, we also payed attention to color. The log-in screen is blue with a light blue ac-cent. This is a welcoming color which is not intimidating to the user. The logout and payment screen on the other hand are purple and red. These are intimidating colors by which the user will know a major change is made when proceeding. This is to prevent users from logging out unintentionally.

User testingA formative evaluation seemed like the most logical user test for the in-terface, since then people’s behavior could be noticed and monitoredeasily.Usability testing:• Objective measurements: giving the user 3 tasks to perform with the interface.• Subjective measurements: asking the user questions about the inter-face.

DECIDEDetermine the goals of the evaluation addresses (Formative: give direction to design process: does idea make sense, choose between options, iden-tify problems): To see whether the user can use the product easily and intuitively. To see whether the user would need/want to use the product if they had the chance.

This is a flowchart of the final prototype

Try the prototype here:https://xd.adobe.com/

view/614d9127-bae1-4238-b156-a637adb4612e/?-

fullscreen&hints=off

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Explore the specific questions to be answered:Tasks (Explain scenario with bonus-card)• You want to buy pizza and a the few other products that are already in your cart, as long as they don’t have aller-gens that you are allergic to: remove magnum, scan pizza, check out.• You want to leave the store without buying anything: (remove all prod-ucts), log out of the app.• You just removed the wrong prod-uct can you get it back?: go back

Interview1. Could you clearly see which prod- ucts were safe and which weren’t?2. Did it take less time to see if the product was safe then when manually checking?3. Did you intuitively understand what steps you had to follow to perform the task?4. Did you feel like you spent more time than you should have on this app?5. What could be changed about the design?

Choose the evaluation approach and combine techniques to answer the questions (“triangulation”):Usability testingA usability test seems like the most thorough of the evaluations. The tests also don’t have to be done in the su-permarket because just the app-inter-face will be tested. This method will give the right information to improve the design.

Identify practical issues:• Users often pressed the sign up button first• Unsafe indication could be more clear• Add button was not clear for every one• Checkout button could be formulated differently• Logout button was easy for some but difficult to find for others

Decide how to deal with ethicalissues: There could be a menu with language options on the bonuscard screen

Evaluate, interpret and present the data: Overall the users found the inter-face very intuitive. They all eventually found their way through to the end, although it wasn’t always faultless. The expert evaluation revealed more problems with the design than the user tests did, but with the user tests there was a good way to quantify which problems were really bothering most people and which were just de-tails.

A few changes could be made to the design according to the results of the user tests, for instance: the sign up button could be made less central, so people don’t get the idea they have to press it to proceed. There could also be ‘first use’ instructions for people who have never used the interface be-fore. The logout button could have a pop-up that says: ‘Log out’, so people know what they pressed.

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User 1 User 2

S1 Logging in was clear. The user un-derstood the bonus card idea.

Login was not clear. The user pressed the “sign up” button several times be-fore understanding the prototype part.

Removing the unsafe product was not immediately clear, because it was not immediately recognized as unsafe.

Removing the unsafe product was clear, because it was immediately rec-ognized as unsafe.

When adding the product, the user did not recognize that the product was safe. The “Safe” sign in the right bottom corner was only seen after 60 seconds.

When adding a new product, the user pressed the menu button instead of the ‘add button’. Then, at the 2nd try, the ‘add button’ was found. The “Safe” sign was recognized immediately.

The checkout button was immedi-ately found.

For checking out, the user again pressed the menu button. At the 2nd try the user found the checkout button.

S2 Login was clear again. Login was clear, because it was the 2nd time using the app.

Removing all products was immedi-ately clear, based in the cross icons.

Removing all products was immediate-ly clear, based in the cross icons.

Menu icon in the right top corner was immediately recognized as a way to get to the logout screen.

Menu icon in the right top corner was immediately recognized as a way to get to the logout screen.

S3 The undo button was immediately recognized as a way to get the delet-ed product back.

The undo button was immediately recognized as a way to get the deleted product back.

User Tasks1. You want to buy a pizza and a few other products that are already in your cart. make sure all products in your cart do not contain relevant allergens for you. When you’re done, pay for you products.2. After walking around in the store for a bit, you decide you would rather go to another store. You would like to remove all products from you cart and logout of the app.3. You just removed the wrong product, try to get it back in your shopping cart.

Questions1. Could you clearly see which products were safe and which weren’t?2. Did it take less time to see if the product was safe then when checking the product labels?3. Did you intuitively understand what steps you had to follow to perform the task?4. Did you feel like you spent more time than you should have on this app?5. What would you change about the design?

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Q1 Yes it was clear, but it wasn’t that appealing so I didn’t read it imme-diately. Once read it, I knew it.

Yes, I saw it right away. Unsafe should not be bigger.

Q2 It takes less time. Yes, because I don’t have to read through all of the ingredients.

Q3 Yes, it is a very simple layout, so it gives a quick overview of all func-tions. It is easy to see what you can press and what not.

Not clear. You tend to press on sign up, instead of scanning the bonus-card. It looks like the main button. Also the add button was not clear

Q4 No, definitely not. Yes, the login was not immediately clear. Also the checkout button.

Q5 Logout button bigger, the ‘un-safe’ part should be bigger, or the whole product should be red. Maybe the price a little smaller.

Sign up button less attractive. Use another word for checkout.

ConclusionSomething that appeals right away doing this user test, is that everything that was unclear the first time, was in fact clear the second time they used the app. Especially with User 2. With this user test, we have to keep in mind that the app does not provide an instruction screen, which most apps do.

The research was purely about the first raw contact with the application with-out prior knowledge. Comparing the user’s behavior during the first and sec-ond time using the app, shows us that no major changes have to be made to the interface. When provided with a small user guide at the first use, the app should be clear for the user.

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8 References1) We blijven veel voedsel weggooien: 135 kilo per persoon. (2016, August 29). Retrieved December 05, 2017, from https://nos.nl/artikel/2128685-we-bli-jven-veel-voedsel-weggooien-135-kilo-per-persoon.html

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9 Appendix IIndividual reflectionsPersonal reflection Batug KaramanFirst of all, this project was interesting for me because I could understand the point of view of the users much personally as I have similar allergies in certain food products. This projected a sense of empathy within me towards the studied users.

My expectations about this project were that it will involve the users more than previous projects, that we have to generate ideas according to their answers on our questions and the project fulfilled my expectations in that way.

Due to the reason that I am a skeptical person it was difficult for me to accept the gathered data as it was conducted in a short period of time. I would had preferred to conduct more research in order to compile further data to pro-duce a much more accurate analysis. However, since it was a group project I managed to compromise and produce proper deliverables for my assigned tasks.

The process of this project taught me how to work more together with users, which is a great experience in order to have slightly an idea how it will work in the future in these kind of projects. Working with users and observing

the information from them in order to come up with a design, helped me a lot in improving my way of thinking about a design.

Also thinking about questions that are going to help you to make the design as good as possible, deciding what I want to take out of the users, were points that helped me improving my-self during this project.

Personal reflection Bianca Liefheb-berAt the start of the course I expected to learn about how to empathize with the user more, and how to create user friendly designs. I wanted to learn how to think about design from the per-spective of the user.

Besides fulfilling all of those expecta-tions, I also learned a lot about how to structure a project that focuses on the user. Frameworks like persona’s, use cases, requirements, QOC’s, and eval-uations helped give me a clear view of the points of improvement of the de-sign. These are all things I will definite-ly use for reference in future projects and design cases.

In this course I personally tried to fo-cus on taking initiative and being de-cisive, since those were some of my weaker points.

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For instance, I proposed more ideas and design choices to the group, and often suggested when to have group meetings. Especially with the final re-port and the nearing deadline I didn’t want to fall back into my habit of wait-ing until someone else made a sug-gestion for a task division, so I forced myself to sit down and not get up before the main parts and structure of the report were finished. It took quite some time, but in hindsight I’m very glad I did it because it saved us all a lot of work later on.

Overall I think this course was very helpful to me, both with the raw skills like knowing about different interview methods and user tests, as well as in developing my personal skills. In the future I can apply these skills to make the designs I create more in tune with the users that will eventually work with them.

Personal reflection Martijn ten BrinkeWhen I first heard about this course I thought it was going to be a course consisting just out of simple tests you do with users like interviews or watch-ing how they will interact with your product. It didn’t seem like an exciting course to follow but I was interested to gain insight on how the way they handle a product may differ from user to user.

One of the things that stood out for me is how users will interpret a sur-vey. I thought that when you ask them elaborate questions, you will get an elaborate answer back, but this isn’t

always the case, especially when you conduct a survey via email instead of a face to face interview. And because you aren’t able to ask further ques-tions via email you don’t always get the answers that are useful for your product design. I think the ways of getting to gather information from the users will be very useful in upcoming design projects.

It was also interesting to see that there wasn’t a overly dominant group leader. Ofcourse we had a leader but it didn’t feel like we were overruled. It seemed to me that everyone got along and that it was more of a team effort. This way of leading is thus way more pleasant and makes people way more willing to help. I will try to use this way of leading in the next proj-ects, to see if it works every time.

I think this was a useful course to me because I gained insight on how users will handle surveys and I also think that the way the group was being lead. I also think it was pretty interesting to see the many ways that you can gath-er information from users.

Personal reflection MathiasVerheijdenLooking back at the past eight weeks, I feel like I have undergone some im-portant developments as a designer. I expected this course to be quite spe-cific and straight forward, but instead, it was very broad and applicable in not only the design process of this course, but also in my other project.

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Perhaps the most interesting part about this course were the users tests and interviews. They taught me that users can behave very differently than your expectations as a designer. It ap-pealed to me, that as a designer, you tend to focus on nice and innovative features, even though they might not be the most suitable for the users. Po-tential users can also give you insights in scenarios that you simply would not come up with yourself.

This course taught me, that perhaps user-centred design, is the most im-portant aspect of every design pro-

cess. By adapting a design to it’s us-ers, instead of letting the users adapt to the design, it is easier to introduce your concept to the market. People will feel comfortable instead of awk-ward when using your design.

Apart from all the different techniques that were covered in the course, the most valuable thing I learned when designing, is that you are not design-ing a product, but an experience. With the main focus on ease of use.

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10 Appendix IIReflection on group workDiscussion on tables

Bianca1. How effectively did your group work?Our group worked very well together. All tasks were finished on time, and there were no arguments among team members. Once the tasks were distributed everyone at least did their part, and sometimes even more than that. In rare cases of a substantial difference in opinion on a design choice, disagreements were settled very professionally and with tact. I’m really content with the teamwork of this group.

2. Were the behaviors of any of your team members particularly valuable or detrimental to the team?There were no team members that were detrimental to the team. Eventually everyone did what they were supposed to do. Considering attending meetings; Batug could often not be present, but he always gave us a heads up when he couldn’t, and made up for the work he had missed later on. Mathias’ prior knowledge in creating app-interfaces was very valuable for the prototyping of our design. His proficiency with InDesign was also really useful in giving the final report a more professional look.

Mathias1. How effectively did your group work?Right from the beginning, the group worked very well together. During the meetings, everyone had a professional attitude towards each other which made dealing with disagreements very easy. The assignments were finished well in time which made our group stress free. There was room for everyone’s opinion, but we mostly agreed on all assignments.

2. Were the behaviors of any of your team members particularly valuable or detrimental to the team?I don’t think detrimental is a good word to use, but yes there was something that could be improved. Batug was often not present during the meetings or the tutor meetings. On the positive side of things, Bianca took the lead in planning the appointments and keeping track of our progress. This made sure we had a structured schedule where everything was documented in a structured way, which was very valuable to the group. I handled all the graphic design work like app prototypes and the report layout. My experience as a web designer were useful in this case.

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Martijn1. How effectively did your group work?I think that the group worked pretty effectively. Most of the time we were dedicated to the job and we just tried our bests to get our desired results. Sometimes we where becoming easily distracted but this was easily solved by taking a short break to get some food. This way of working made the group work a lot more pleasant for everybody.

2.Were the behaviors of any of your team members particularly valuable or detrimental to the team?I think it was very valuable that Bianca always tried to make everything more organised by setting deadlines so ev-erybody had their work done in time. It was also very useful that Mathias was familiar with making screens for apps. Thanks to this we had a great app to do user tests with. Even though Batug couldn’t come to the meetings, he always notified us

when he wouldn’t be able to come, so we could anticipate on that. and even though not everybody was always present during the meetings, the ses-sions were always very productive.

Batug1. How effectively did your group work?In my opinion the group was always working effectively when we came to-gether. The meetings were always in a positive atmosphere which helped the group work together even more effec-tively. The weekly assignments were always done on time with no problem. The group was in a good condition from beginning till end.

2. Were the behaviors of any of your team members particularly valuable or detrimental to the team?In my opinion, there was no detrimen-tal member in the group. Everyone knew their responsibility which is the important part. Mathias had always more knowledge about using the pro-grams effectively, which was really valuable for our group. The deadlines that were set were mostly organized by Bianca, which helped us finishing our tasks on time through the whole project. The general atmosphere in the group was always positive which was had a big influence on our work.

The peer review forms can be found in the additional appendix from week 7.

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11 Additional Appendices

Appendix week 1

Storyboards(Full size on page 32)Mathias: See Week 1

Bianca:

Martijn:

Batug:

Experience goalsMathias:Desirable aspects:• Helpful: The main desirable goal is to help children with allergies and their parents to make a deliberate choice for their food.• Enjoyable: The design should be easy to use and understand for both children and parents. Also, children should see it as an extra instead of a restriction.• Surprising: People with allergies are often focussed on what they can’t eat, instead of what they can. Some foods they can’t eat, have surprising

alternatives most people don’t know of.• Fun: Of course children will quickly see an allergy as a huge drawback, but the design should show them that there are plenty of things they can still enjoyUndesirable aspects:• Frustrating: The design should be able to show the required information right away. People who are shopping food don’t have the time to dig in to menus to finally find out they can’t eat it.• Childish: Although the target group is 8-12, the design shouldn’t be childish. Children don’t like to be treated in a childish way, but rather in a more adult way, acknowledging the (for them a lot) knowledge they have.• Dangerous: Because people with allergies will be relying on the design, it should be absolutely faultless to prevent accidents from happening.

Bianca:Desirable aspects:• Helpful: the main desirable aspect is that the design helps children with allergies (together with their parents) pick out food they can eat.• Satisfying / easy: ease of use is also a desirable aspects, children should be able to learn it quickly• Exciting / fun: the experience is mainly about the children, so there should be an element of fun to the design to draw them in• Supporting / stimulating: stimulating children to think about their allergies more actively and preparing them for shopping on their own

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Undesirable aspects:• Dangerous: through lack of information or communication products might accidentally be assigned to children who are actually allergic to them (especially when people become reliant on the technology)• Frustrating / difficult: difficulty isn’t really the problem (the children need to learn from it after all) but having an unnecessarily convoluted interface or design is undesirable• Childish: (on the flipside of difficulty) the design should promote autonomy and stimulation, making it too simple or childish could result in the target group not taking it seriously

Martijn:Desirable aspects:• Helpful: Our product needs to be helpful to the patient with allergies• Enjoyable: The product should be pleasant to use• Motivating: It should motivate the customer to use the service• Fun: The product should be nice and fun to handle

Undesirable aspects:• Boring: The product shouldn’t bore the users otherwise they won’t use it• Childish: It shouldn’t be childish otherwise the children won’t like it• Frustrating: The product shouldn’t cause any frustrations otherwise people will not use it.

Batug:Desirable aspects:• Helpful: Helping the children and their parents in order to avoid the allergies that the children have during their regular grocery shopping.• Fun: Since it is a children centered design, it should be fun in order to get

the attention of the children which will accelerate the learning process.• Satisfying: If a design is not satisfying enough, the people will not use it which makes satisfaction an important point.• Pleasurable: It is important that the user likes to use the design, otherwise using a design that makes the user uncomfortable will not be successful design.

Undesirable aspects:• Childish: It is important that the design should not be too simple in order to still keep the attention of the user, otherwise it wouldn’t work in the way we expect.• Dangerous: Since allergies can cause big health issues and the users will trust this design to overcome these problems, the design should be made with accuracy.• Boring: In order to make the users use the design it should be enjoyable, otherwise if a design is boring it will be hard to teach the children and use it.

Contextualised definitions of components of usabilityMathias:Effectiveness: How accurate can the design, based on the user’s input, determine whether the consumer can eat a product or not.• Percentage of users who are able to use the system correctly the first time: children: 60-80% (due to the big difference between 8 and 12 year old children), parents: 98%• The amount of errors: should be 0

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Efficiency: The added ‘work’ it takes for customers to use the design• Time added to normal shopping time: 0-5%• Number of key presses to get food information: 0-1• Time for a user to learn how the design works: 0-5 minutes

Satisfaction: If the user gets the feeling that the design works and that the user trusts the design• Percentage of users that uses the design instead of reading labels : 90%• Percentage of children that understands what their allergy means: 60-80%• Percentage of users that have the design ‘under control’: 98%

Bianca: Effectiveness: how accurately can the product convert presented input by the customer about their food allergies into what products contain the food in question.• number of fatal errors: preferably 0 (always be on the safe side)• percentage of users successfully able to complete the task: children: 70% - 80%, parents: 98%

Efficiency: the time it takes children and their parents to get used to the product,and to use the product.• Time to complete shopping: no longer than normal shopping time for people without allergies (so around 5 - 15 min)• Number of key presses / time to initialise (process allergies): checking all food allergies should be done carefully, so this should take around 10 - 20 min• Number of key presses on daily basis: one for assignment to customer, one for assignment of product, one for paying• Time for a child to learn how the

process works: preferably within the first session of use, so 5 - 15 min

Satisfaction: easiness of use and feeling of safety• Percentage of customers that spend less time shopping than before design was introduced: 90%• Percentage of children who become more aware of food allergy: 70% - 80%• Percentage of customers who feel ‘in control’ of product: 98%• Percentage of users who would recommend product after use: 60%

Martijn:EffectivenessThe product should help the patient properly to reduce the risk for their children to come in contact with allergens.

EfficiencyThe product should help the client, but in the process it should not waste a lot of effort to accomplish a small goal.

SatisfactionThe product should be pleasing to use and it shouldn’t be annoying or complicated in use.

Batug:Effectiveness: How precisely will the design detect if a person can eat that product or not depending on the users inputs.• Mistakes that the design can make: 0 in order to overcome bigger health issues.• Percentages of the users who can use it without errors: Parents(98%), Children (60%-80%)

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Efficiency: The total time that the users will be use before they can properly use the design.• The total time that the user need in order to learn how it works: 10 minutes• The extra time that shopping will cost: 0• The time to get the information about the product: 1 - 20 sec

Satisfaction: In order to use the design, it should give the user the feeling that it works anytime when it is needed.• Percentage of children who learned more about their allergies: 70% - 80%• Percentage of users who rather use than read: 90%• Percentage of users that can use the design without any problem: 98%

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Storyboards

Bianca

Martijn

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Batug

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Appendix week 2

Individual persona hypothesesBiancaJordy (10) and Petra (42) Vlagge (mother and son).They live with the two of them, and Jordy’s younger brother Thies (7). Petra divorced Jordy and Thies’ father 3 years ago, and now raises them on her own, with help from her mother (Margreet, 65).They used to live in Heerhugowaard, but recently moved to Zaandam for Petra’s work.Jordy has a severe gluten allergy. He doesn’t like this, because it means he usually can’t go to his friends’ birthday parties or sleepovers. He is very stubborn, rebellious and adventurous, and will try to do anything to come to the parties anyway. But his mother refuses to let him go without either her, or her mother’s supervision because she knows how dangerous it can be if he accidentally eats the wrong thing, and how easily some spore-ingredients in products can be overlooked.

Jordy hates going to the supermarket, because he thinks his mother takes forever to look through all the ingredients on the packaging, while he actually just wanted to go home quickly and play soccer outside with his friends. He thinks it’s unfair all the other kids get to pick and choose whatever they eat and can go to all the parties on their own, while he always has to be careful and needs his mom or grandma with him. Even his little brother gets to do more on his own than him and gets to eat all the good things, and that bothers him.Petra wants Jordy to become more aware of his allergy, so he becomes less reckless about the things he eats. She also wants him to be able to do groceries

and eat without her supervision, but feels that Jordy isn’t ready yet right now. He still has a lot to learn about his allergy, and the consequences it can have.

MathiasFather Patrick (38), mother Anna (37), son Frank (10) and daughter Julia (8) live together.Both Julia and Frank have extreme gluten-allergy. Since Patrick works full time and Anna works from home, she does most of the cooking and grocery shopping herself.Anna really likes cooking, but because of the allergies in her family, Anna spends a lot of time searching for special recipes and making shopping lists. Because of this, it is very time consuming to find new recipes and cook diversely. For this reason, the family often eats the same food.

Another problem Anna faces is that when she goes grocery shopping, she spends a lot of time reading product labels and looking for special gluten-free food. Because a lot of products contain a huge amount of ingredients, Anna is never sure if something is gluten free without reading the label.Anna would like to be able to find recipes more quickly, enabling her to cook more diversely. Secondly, she would like to know whether she can cook a product for her family without reading the whole label, which is very time consuming.

MartijnMitchell is an 11 year old boy who still lives at his parents home. His parents, Andrea and Ivo. Mitchell also has an older brother called Tim who is 14 years old. Most of the time they live as a happy family together, but since the death of his grandparents, tensions started to rise in

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the house from time to time. He is in the 7th grade of primary school and he is very bright compared to his fellow class-mates.

Mitchell has a very severe lactose intolerance and when he comes in contact with lactose, he will be suffering from a very severe stomach ache. Mitchell also has a light strawberry intolerance, this intolerance isn’t as severe as his lactose intolerance but when he eats strawberries, he will get tingling sensation on his tongue.Mitchell always plays together with his friends and his brother sometimes joins him too. He likes to play soccer in the weekends and often has sleepovers at his best friend Mike. So he often eats at Mikes home, but he always takes his own food with him due to his allergies. Mikes mother, Petra finds this inconvenient sometimes, because she always prepares delicious meals and those meals take hours to cook. And after a busy day of cooking she doesn’t like to prepare another meal for Mitchell. His older brother always tries to look out for Mitchell but even he sometimes doesn’t notice that some meals contain the allergens. He definitely knows what allergens to look for, but when a meal has been prepared he can hardly distinguish all of the ingredients.

When Petra asks Andrea what Mitchell can eat, Petra finds this difficult to describe, because there are a lot of products which contain the allergens for which Mitchell is intolerant. Even Petra finds it difficult to do groceries for Mitchell because of all those allergens. When she is in the supermarket she is also often distracted by all the different types of packaging and thus sometimes doesn’t read the back of the packaging

for the allergens. And sometimes the wrong types of food find their way into the home of Mitchell and are sometimes even given to Mitchell which causes him to become very ill.

Goals:Petra would like to have a nicer shopping experience. She wants that the allergens are more clearly indicated on the packaging, even allergens like strawberries, because those are hardly recognized by others as allergens. She would also like to have a system where she can clearly communicate the allergens of Mitchell to other people like Mikes mother.

BatugThe Family Houston consist of 3 members; Father Nelson(45), mother Anne(43) and the son Alex(9). Alex is highly allergic to peanuts and the mother which is the one who does the groceries and cooking for the house. Since her son is allergic, she has to be extra careful while picking the products what she is going to use for cooking. One of the problems that she is facing is that, the most products that might be packed in the same factory with peanuts might containing traces of these which puts his son in dangerous position. This situation makes her spend more time on the shopping list in order to make the peanut free grocery list. Another problem is the use of time in a supermarket, because of the particular grocery list the time that the family spends on groceries is unnecessarily long which can be used better in a more efficient way during the day.The wish of Anne is to protect her son from his allergies but at the same time

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spend more time with him. Saving the time that will be spend on shopping lists and groceries is her biggest aim.

Individual pilot interviewsBiancaPilot questions1. Who decides what to eat / who cooks in your family and who do they cook for?2. What kind of allergy do you / does your child have?3. What do you need to know specifically about products in the supermarket (what can your child not eat)?4. How do you select food / ingredients?5. Do you decide / check on products when you’re making the shopping list or when you are in the grocery store?6. (If A) How do you decide on shopping lists (where do you get the info)?7. (If B) How do you check the products in the grocery store (info)?8. How long does it usually take for you to make a shopping list and do groceries?9. What takes the longest amount of time when getting food for a meal?10. What do you wish went faster, or was easier (what is the most annoying part of making meals?

Pilot answers1. The mother usually cooks for the whole family. She also decides what they eat that day.2. The child has a peanut allergy.3. I need to know if there are peanuts or trace-elements of peanuts in it. Like if it was made in a factory where peanuts were also treated, we can’t have it.4. I usually just make a general recipe that doesn’t contain peanuts, and then I check in the supermarket whether the ingredients have trace-elements of peanuts or not.5. Both. I don’t make things like peanut

soup, because there will obviously be peanuts in it. I just take a guess of what products in the recipe might have peanuts in them, and I check it in the store.6. Sometimes it says it in the recipe, or it gives a replacement, and otherwise I’ll have to improvise.7. I just look at the label on the back, there it says whether it has peanuts in it.8. All together about 40 minutes.9. The shopping itself takes the longest.10. The shopping. It takes a really long time to check every product on peanuts.

MathiasPilot questions1. What allergy does your child have?2. How do you decide what meals you cook, regarding to the allergy?3. How do you choose products for that?4. What do you need to know about the products you buy?5. How do you find that out?6. How much time does that take on average?7. Do you often cook the same meals?8. Why (Q7)?9. Do you often try new recipes?10. If yes (Q9), are they difficult to find?

Pilot answers1. Nut allergy2. I can’t cook anything containing nuts, which seems pretty easy, but I also have to watch out for nut-spores. A lot of products are made in factories where they also process nuts. So sometimes it is pretty hard to find an alternative for a product.

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3. Most of the time I decide what meals I want to eat for the next three or so days. For the meals I cooked before, I know what I can buy, so that’s pretty easy. But when I want to try out something new, I really have to watch out while buying ingredients. Sometimes I tend to just buy something because it definitely does not contain nuts, but then again, there can be spores, so I have to check it no matter what.4. So not only if they contain nuts, but also if they contain spores of them.5. By reading labels, or asking a supermarket employee, but they rarely know anything without reading the label themselves.6. Reading the label takes me maybe one, sometimes two minutes per product, because the text is so small and full of difficult names. If I’m not sure and ask an employee, it takes even longer. Maybe 3 minutes.7. I think there are two or three meals we eat every week. The rest of the week consists of other meals I have cooked before, but we eat them once every two weeks or so. 8. It is just easy, because I know that there are no nuts or spores in them, so I don’t have to think about it when I go grocery shopping. It sometimes gets a little boring though. I like cooking and trying new things (my son doesn’t by the way haha), but that is pretty time consuming to do.9. Maybe once every three weeks perhaps? But as I said, it takes quite some time…10. Well, finding the recipes themselves is not very hard, but finding out if their ingredients contain spores (or nuts, but that’s easy to find out) is much harder.

BatugPilot questions1. What are his/her allergies ? 2. Does he/she knows about the allergies ?3. If yes, how do you make sure that you have his/her attention while teaching it ?4. What does make him/her stay away from that product ? 5. Who cooks at home ? 6. Who does the groceries ?7. How long does it take to create a grocery list ? 8. How are you making the grocery list ? 9. How much time do you spend on doing groceries ? 10. During the time making a list are you looking for the specific product or also the related products ?

Pilot answers1. She is allergic to milk and milk products.2. Yes, she knows what she is allergic to and that she can’t consume it.3. -4. I made sure that she understood it perfectly, understand how dangerous it is to use that product. 5. Most of the time my wife but sometimes I help her as well. 6. Most of the time we do the groceries together.7. I realized that it took more time than the other families around us. 8. We use booklets from doctors which tells us which products contain milk or milk products.

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9. It depends on the list, because we make the list before we leave and make sure that we find the specific products that we have written down. 10. We look at everything just to make sure that our daughter can eat safely.

MartijnPilot questions1. What kind of allergy does your child have?2. Have you ever looked over the allergens of a product just because it had a nice packaging?3. How often do you buy a product that your child can’t eat because of the allergens?4. Why do you make these shopping mistakes, because of a lack of time or is it because you don’t want to read the information on every package?5. Are you always aware of your child’s allergies while shopping?6. Does your child often eat at other places?7. When he does this, do you give him food to take with him?8. Do you give the other person who cooks clear instructions for what not to cook?9. Does the communication between you and the other cook run smoothly?10. Are there often mistakes made when somebody else cooks for your child?11. How do you communicate the allergies to the other cook?12. When you are doing groceries, do you make a list beforehand or do you just see what you get when you are at the supermarket?

Pilot answers1. My child has a very severe peanut allergy and he is also allergic to cats and dogs. He also has a very light lactose

intolerance.2. Sometimes when I see something that has a reduced price and is being promoted I sometimes buy it just out of curiosity.3. It doesn’t happen very often to me but sometimes I think of buying something for myself but then I accidently give it to my child.4. Sometimes I just assume that there won’t be any peanuts in it because it i very unlogical for the type of product, like those sultana cookies, every sultana product doesn’t contain peanuts, but there are still traces of peanuts inside the cookies. 5. I always try to do my best watching out for allergens, but sometimes when there is a promotion it is sort of distracting for me and then I tend to forget the allergies.6. He doesn’t do that very often, he sometimes goes to his grandparents or to his best friend, but this is on average once a week.7. I won’t give him food to eat over there, because I trust the parents and his grandparents, but when he eats somewhere else, where I don’t really know the people, i’ll give him some food.8. Most of the times I just tell them what he is allergic for, I think that is sufficient for most cases.9. The communication definitely goes smoothly, sometimes I get some questions about specific products, whether my kid can eat them or not.10. It hasn’t happened a lot but sometimes the other person simply forgets that my child also can’t eat products that may contain traces of peanuts, so that has caused some very stressful situations for me.

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10. It hasn’t happened a lot but sometimes the other person simply forgets that my child also can’t eat products that may contain traces of peanuts, so that has caused some very stressful situations for me.11. Most of the times I just tell them face to face, but if I can’t do this I’ll give my son a list where his allergies are mentioned, or i’ll give the person a call and tell it by phone.

12. Very often I have a list of basic things that I need to get, but when I’m in the supermarket I always tend to buy other things than just the things of the list. Especially when I’m hungry, then I just load up on snacks.

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Final interview answersMartijnPerson 11. Food allergy for: all types of grain, egg, milk, nuts, chocolate,soy, apple, kiwi, blackberry and pear. And a contact allergy for some types of plastic.2. Everything I buy is fresh, no prepared foods and everyday something else for the vitamin intake. mineralen inname.3. Just check at the supermarket for what fresh vegetable are available and I cook a lot with spices and rice/olive oil4. Always at the supermarket, there are quite often made changes to a prepared meal.5. Meestal gaat dat wel goed, je moet er wel aan gewend zijn en weten waar alles voor staat anders wordt het wel lastig.6. 10 to 20 seconds on average, it depends on the amount of ingredients.7. Yes of course, most of the times I had overread it or the composition of the ingredients has changed in the meanwhile and I didn’t check it.8. Regularly if I want to try something else.9. Most of the times I adapt the recipes, I also read the recipes that the supermarket gives because they contain a lot of fresh food.10. Yes, from the age of 5 she knew that she couldn’t eat everything. She could easily indicate the main allergies, but composed products were harder to indicate.11. Yes, she was very early self aware because she got sick quite often.12. Many common party snacks she couldn’t eat due to her allergies, so sometimes it was hard to come up with something else. Often there are many additives in children’s candy, that you can’t see on the outside. So i’m quite often busy reading packages in the supermarket.

Person 21. Nuts, seeds and peanuts and a lactose and egg intolerance until the age of 10.2. At the first bites, just pure meat and vegetables and rice and potatoes, so no processed foods.3. I introduced every food very carefully and if that went well, I went on and tried another one.4. Always at the store.5. The letters on the packaging are always to small, so when I need to read what allergens are inside of a product it’s quite difficult.6. The first time it costed me a lot of time, but after a while I got used to it and I got much quicker.7. Yes, products like Milka and Digestive cookies, because they are very similar to products that my kids could eat, but they contained allergens which weren’t clearly mentioned on the packaging.8. New recipes aren’t a problem, I just need to be careful and use products without too much additives.9. They aren’t difficult to find, especially because I have become a member of an allergy union, so in their magazines they will also give me tips for new recipes. The also gave me a credit card shaped magnifying glass to help me read the small letters on packaging.10. My child is very self aware of his allergy, and is very responsible in handling this.11. He is very alert when it comes to eating food.12. Doing groceries isn’t that big of a problem. It’s just tricky when you try new products.

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Person 31. A common nut, milk and egg allergy, but the nut allergy was pretty severe. 2. I watched carefully the ingredients on the packaging and asked at restaurants if the food contained the allergens.3. By reading the etiquettes4. I just look out for the allergens in the products.5. It is pretty simple, but if I’d go out for dinner you never know how serious they take the allergies.6. 30 seconds or less7. Yes, because I thought it was a familiar product or package, but it wasn’t8. On a regular bases9. No they weren’t10. Yes, he was very aware because the nut allergy was life threatening, so he kinda had to.11. Yes, and with unknown products he first tried a small amount to see if it would affect him.12. The etiquettes aren’t that readable and there’s a long text instead of a label like layout, which would be way more easy to read.

Person 41. Nuts and different kinds of fruit.2. I determine what we like to eat and I replace ingredients when necessary.3. I read the ingredients before buying them.4. No, the allergy is for raw nuts and fruits so we don’t have to pay attention to that.5. No they are clearly listed.6. Few minutes.7. Yes, with Alpro, because the doctor advised it for us because of our stomach aches, but we are apparently allergic to that too.8. Regularly.9. No.10. Yes.

11. Yes.12. None.

Final interview answersBatugPerson 11. Peanuts.2. I decide in the way that I don’t use any products that contain peanuts.3. I don’t make any use of products that might have peanuts in it, and try to read a lot about the product at home before buying it.4. I check everything most of the time at home and make the list, but there are always thing that I have to check while I am in the shop.5. One difficulty is that not every package is clear what it properly contains and to overcome that I buy most of the time branded products, since I know more about those.6. The checking time in the store depends most of the time how clear they are because if it is clear then I can easily decide but if it is not clear enough I just don’t buy it. The checking at home takes more time since, I have the time to do a bit more reading about the products and make the list.7. I can’t say it is accidently because we remain also products that contain peanuts at home but just make sure that our child won’t take it.8. I try a lot of times different recipes because there are a lot of meals/recipes that don’t contain peanuts, so it is not really a difficult situation.

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9. They are not hard to find because there are a lot of different recipes where peanuts aren’t used.10. Yes he knows since he was 6.11. He does because we taught him that it was dangerous for him to have it, and he understood because he had some accident where he ate a cake that contained peanuts.12. I guess as a child the problem would be not being able to eat what other kids can eat, since it is a peanut allergy, there are a lot of candy/chocolate that contain peanuts.

Person 21. Fish.2. I absolutely don’t make any meals that contain fish and fish oil. 3. I make sure the products don’t have any fish oil in it.4. Most of the time I check the products before I decide to make the meal and so I check the products always before I go do groceries.5. The main difficulty is that there are really odd products that contain fish oil and that makes it dangerous.6. The checking is always at home, and it takes about 5 minutes per product.7. I have made sure always that we never bring any fish products home. 8. Well, still without the fish products there are a lot of different recipes so yes I make use of different recipes all the time.9. No, because there are many products that doesn’t contain fish products.10. Yes, she knows about it.11. Yes she does, because we taught everything really well about her allergies.12. We don’t have many problems because Julia doesn’t want anytime fish related products.

Person 31. Gluten.2. I have to check beforehand when I decide the meals because most of the products contain gluten.3. I choose the products most of the time out of the gluten free section.4. Most of the time I check it at home, but there are always products that I have to check in the store before I buying it since gluten is in the most of the products.5. The difficulty in our case is that even the most simple cookies have gluten in them, which makes everything harder in the way of time because it makes me read everything.6. I can’t really give a specific time but most of the time checking one product equals to the reading time of the packaging, but at home it takes more time since I have to do a lot of research about the products.7. Yes, but after all we also have a lot of products that does contain gluten at home.8. I don’t go out of the gluten free recipes, so that makes me stick in kind of some recipes.9. No, because I buy them from the gluten free section.10. Yes he knows.11. Before he didn’t pay attention and we had a couple of incidents, but now he is more knowledge about it.12. A child with a gluten allergy is a big problem, because gluten is everywhere. Everything that he gets attract to contains gluten, which makes it quite hard.

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Person 41. Tree Nuts.2. I don’t cook any meals that contain any type of nut in order to overcome any situation.3. I check the ingredients of every product that I am not familiar with and try to buy the products that don’t contain any type of nuts.4. Most of the time in the store.5. The difficulties are that, sometimes the products are not really clear what type of nut it contains which is really important in a situation like ours. 6. About 1-2 minutes per product if it is clearly written down.7. I did. I bought a product that contained apparently walnuts which was not

described on the packaging properly.8. I try a lot of different recipes because I can make a lot of different meals that does not contain any tree nuts.9. No, because as a mother you know most of the time which products can create a allergic reaction.10. She knows since she was 7.11. She does pay attention a lot luckily, because she knows the consequences.12. The problem was when she was younger, because the chocolate products most of time contain a type of nut. This was hard before because stopping a kid from eating chocolate is always hard.

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Final Interview AnswersMathiasPerson 11. Gluten.2. I usually look for recipes on the internet.3. There are special areas in supermarkets with gluten free products.4. In the store before I buy them.5. Some products are using symbols instead of text now. I think that makes it better to understand.6. Very short, I find it easy to find.7. Sometimes there are gluten in thing you wouldn’t expect them to be in. That is annoying sometimes.8. Almost every week.9. I get a lot of inspiration via the internet.10. Yes.11. Yes, because I told him to do so.12. The amount of choice. Person 21. Nuts2. It is pretty easy to avoid nuts, it’s the spores I have to keep in mind.3. Almost all products say what allergens they contain on the label.4. In the store.5. The text on the labels is often very, very small.6. It takes a lot of time in the beginning, but it gets easier once you know the products. Two annoying things are first, that some products change their ingredients once in awhile and secondly, that you have to research other products if your standard product is sold out.7. No never, I’m always careful.8. Pretty often.9. No, if you take the time to find the right resources, it is pretty easy.10. Yes.11. Yes, because a nut-allergy can be deadly.

12. Grocery Shopping in foreign countries. Nearly impossible to find out about allergens. Person 31. Lactose2. Avoid lactose as much as possible. Sometimes I cook something else for him.3. Find out if products contain lactose, although that is pretty easy with lactose.4. In the store.5. Small text, hard to understand.6. A few minutes, depending if it’s a new product or not.7. Yes during shopping abroad.8. Almost never, because it takes quite some extra research.9. - 10. Yes.11. Not often, I usually keep an eye on what he eats.12. Cooking diverse meals. Person 41. Nuts2. I of course do not buy products with nuts, but I also have to check for spores. So I after i find a recipe, I still need to do some research3. Same as answer 24. In the store.5. Small text, hard to understand.6. I would say one minute. Two minutes at worst.

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7. Yes that was when I was shopping in Italy when I was on a vacation. The label was not understandable since everything was in Italian.8. Not so often, because it takes time to look into every ingredient.9. - 10. Yes.11. Not often, I usually keep an eye on what he eats.12. Cooking diverse meals.

Final Interview Answers Bianca Person 11. Son: Coeliakie and lactose/milk intolerance, Daughter: Coeliakie2. Everything gluten free for both kids, and the rest of the family sometimes eats with them and sometimes doesn’t.3. (I) look at the ingredients whether there is wheat flour or other gluten-containing grains in it.4. Both5. Gluten isn’t always mentioned in the ingredients. I know there is gluten in wheat flour and barley/malt spelt, but when I visit someone and that person does the groceries it’s not clearly mentioned on the etiquette.6. Not long, 30 sec - 1 min.7. Yes, I read over it because it wasn’t printed in bold. Luckily my daughter read it once more and saw it.8. Not often.9. No, I don’t think so.10. Yes11. Yes, both.12. When something they like leaves the assortment. It’s very expensive. The fresh bread isn’t delivered every day, I often can’t get it in time.

Person 21. Hay fever and multiple fruit allergies.2. Cooking went fine, raw fruit was ill-fated.3. Searching for other fruits and giving them a little every time and then waiting.4. Both5. Fresh fruit is often processed into products6. Not so much7. Yes, because fruit was processed into something which I hadn’t seen. Generally, in my case, things are easily separable.8. I try something new every week.9. Yes, because hay fever comes back in certain periods of time (or when living near the sea). Learning to cook without fruit is possible as long as you eat enough vegetables.10. Yes11. Absolutely12. Not many big problems, just have to look which products have fruit in them. Person 31. Cow milk and sugar intolerance2. I cook everything without sauce. As dessert, sojapudding.3. I read etiquettes.4. In the store5. Unclear mentioning, other names and/or e-numbers6. No idea

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7. When I don’t understand the etiquettes.8. Sometimes9. No, they are easy to find on the internet.10. Yes11. Yes, they don’t completely keep to it now and then.12. No big problems, there is plenty of offers. Person 41. Peanut and nut allergy2. What he likes.3. What I’ve tried before that didn’t give any problems.

4. In the store5. The mentioning of ‘could contain traces of peanuts and nuts’, because then I don’t know how dangerous it is.6. 10 seconds?7. Yes, it wasn’t visible based on the description, but my child got an allergic reaction.8. Not often9. No, if there are no peanuts or nuts in it, I can try it.10. Yes11. Yes12. That you can’t just try something new or some other brand.

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Appendix week 3

BiancaAssignment ARequirementsFunctional:• Description: The product shall not take more time processing ingredients of groceries than the time it takes to normally check the etiquette.• Fit criterion: No longer than 30 seconds.• Customer satisfaction: 2Look and feel:• Description: The product shall be attractive to audiences of 8 -12, and to adults.• Fit criterion: At least 70% of children between 8 - 12 are excited to use the product when they see it. At least 70% of adults are interested in using the product when they see it.• Customer satisfaction: (child) 4, (adult) 3Ease of use:• Description: The product shall be easy to carry while doing groceries.• Fit criterion: The product is not heavier than 3kg, and not larger than 0,027 m3.• Customer satisfaction: 3Ease of learning:• Description: The product shall be easy to understand on first try for adults.• Fit criterion: At least 98% of adult users are able to complete the task.• Customer satisfaction: 4User experience:• Description: The user will feel aided in their food-choice by the product.• Fit criterion: The product gives information about the food, and gives an advice on whether the user should buy it.• Customer satisfaction: 4Performance:• Description: The product shall reduce the time spent on the process of

checking products for allergens• Fit criterion: The product reduces the time spent on the process of checking products for allergens by at least 30%.• Customer satisfaction: 4 Mathias Assignment A Requirements Functional:• Description: The product should have high-dpi screen, to be as clear as possible.• Fit Criterion: Text and images should not appear pixelated to the user.• Customer Satisfaction: 3 Look and feel:• Description: The product should not appeal ‘cheap’ to the user.• Fit Criterion: The product should seem of high quality so the user feels like the displayed information can be trusted.• Customer Satisfaction: 4 Ease of Learning• Description: The user should be able to use the product without training• Fit Criterion: 90% of users should instantly know how to use the product• Customer Satisfaction: 4 Ease of Use:• Description: The product should tell required information within a short amount of time.• Fit Criterion: 90% of users should find relevant information within 30 seconds.• Customer Satisfaction: 5 User Experience:• Description: Users should feel they can trust the product• Fit Criterion: 90% of users should use the product without hesitation.• Customer Satisfaction: 3

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Performance:• Description:The product should keep working if the power goes out.• Fit Criterion: The product should be able to keep working for two hours.• Customer Satisfaction: 1 Martijn Assignment A Requirements Functional:• Description: The product should not be time consuming to use.• Fit Criterion: The product take 5 seconds to display it’s information.• Customer Satisfaction: 3 Look and Feel:• Description: The product should have a sleek and simple appearance, but it will attract the different user groups.• Fit Criterion: Everybody should attract all users.• Customer Satisfaction: 5 Ease of Learning:• Description: The product should be easy to use, and requires no learning• Fit Criterion: Customers immediately know how to handle the product.• Customer Satisfaction: 3 Ease of Use:• Description: The product should be easy in use and not be to complicated.• Fit Criterion: The user easily know how to handle the product within 40 seconds. • Customer Satisfaction: 3 User Experience:• Description: The customer should get the feeling that they are being helped, while they are not being bothered.• Fit Criterion: 80% of the users get the feeling that they are being helped.• Customer Satisfaction: 4 Performance:• Description: The product shall reduce the number of mistakes during shopping

for people with allergies.• Fit Criterion: The product should reduce this number by at least 20%.• Customer Satisfaction: 2 Batug Assignment A Requirements Functional:• Description: The product should give the user the correct information about the scanned food product. • Fit criterion: The system in the product should not mistake and end up with a wrong information.• Customer Satisfaction: 4 Look and Feel:• Description: The product should be have an attractive look to the users. • Fit criterion: The product should look like it is a really pricey product.• Customer Satisfaction: 3 Ease of Use:• Description: The product should not have any unnecessarily buttons/options.• Fit criterion: The user should not get confused with needless choices.• Customer Satisfaction: 2 Ease of Learning:• Description: The users should not need any manual to learn how the product works.• Fit criterion: 95% of the users should be able to understand how the product works at first sight.• Customer Satisfaction:4

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User Experience:• Description: The users should be eat their meals without any doubt after using the product to create their grocery lists.• Fit criterion: The product should give 100% preciseness.• Customer Satisfaction: 4 Performance:• Description: The product should not have any battery problems.• Fit criterion: The product should not cause any power problems.• Customer Satisfaction: 3

Bianca Assignment C Mapping:• Good mapping: Position of the speaker and voice receiver on a phone. When a phone is placed naturally in the hand and then held to one’s ear, the speaker is at ear height, and the voice receiver is at the height of the mouth.• Bad mapping: USB sticks. It is frustrating to have to make a 50/50 guess of whether the right side is up every time you need to plug a USB stick into something. Affordance (phone):• “…” icon means: options/there is more information here.• Outlines around a word mean: clickable/you can fill something in.• “Play” triangle/gif symbol over still frame means: this is a video/gif, you can watch it by clicking the screen.• Home button: It’s at the position of the thumb, and it’s a button that looks like it can be pressed. Constraints (phone): Physical: • A phone charger can’t go in the wrong way. Logical: • Slight tilting or dragging of the screen when touched means: you can’t scroll

further because there is nothing more to see. You are at the end of the page. Cultural: • Grey text or a grey symbol means: this function is off or not able to turn on. Mathias Assignment C Mapping:• Good mapping: The shutter button on a DSLR camera. It is placed where your hand naturally rests on the device.• Bad mapping: A row of light switches on a wall. You never immediately know which button controls which light. Affordance (phone):• Greyed out text or icons indicate they cannot be pressed or are not relevant in the current state of the system. Constraints (phone): Physical: • The volume up and down button. The UP button is on ABOVE the down button, and the down button is below the up button. Logical: • Opening the camera interface. To open the camera interface, you have to press an icon that looks like a camera. Cultural: • The answer and deny button. The answer button is green, which means ‘go’ or ‘yes’ and the deny button is red, which means ‘stop’ or ‘no’.

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Martijn Assignment C Mapping• Good mapping: The fingerprint sensor on the iphone, because it is a natural place to rest one of your fingers.• Bad mapping: Phone chargers because when it’s dark you can’t really tell if a micro USB charger is upside down or the right way. and is mostly in the way of your hand. Affordance (phone):• The slider on the side of the phone tells you to slide it because of its textured surface and the gap next to the slider. Constraints (phone): Physical: • You have only one place to insert your charger in just one way. Logical: • When you want to call someone, you press just the icon with the phone symbol. Cultural: • The pick up button is green which isalways positive and related to going on with something instead of red, which means stopping and thus denying. Batug Assignment C Mapping:• Good mapping: The lock/unlock button is placed in the way that the users hand rests on it.• Bad mapping: The stove knobs. User doesn’t get it at the first time, which nob fires which pit. Affordance(Phone)• The volume buttons on the side of the phone, show whether to increase and decrease the volume. Constraints(phone): Physical: • There is only one way and one port to plug your headphones in. without any

other way possible. Logical: • Pushing the lock button longer than normal, makes a screen appear that asks if you want to turn the phone off. Cultural: • Red colored text points that something is important, that can make changes or you might have to check again.

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Appendix week 4

BiancaAssignment BScenario:The Vlagge family is doing groceries. The family consists of the mother Petra (42), the oldest son Jordy (10) who has a gluten allergy, and his younger brother Thies (7). Jordy would much rather be playing soccer with his friends, but his mother gave him the task of gathering the things from the shopping list. Petra takes one of the self scanners from the rack, and fills in her bonus card info to show that it’s her.

She has previously entered Jordy’s allergy into the personal bonus card information via the website, so the scanner can automatically filter out the products that contain allergens. She gives the scanner to Jordy and he rushes through the store, frantically scanning all products on the list. With some of the products the scanner shows a red screen, and Jordy knows this means he needs to put the product back because he can’t eat it. Eventually he has gathered everything from the list and returns to his mother with a grin, proud of how fast he was. Petra checks that he got everything, and then pays. They return home in less than five minutes.

MathiasAssignment BScenario:Sylvia is doing grocery shopping for her family. Her son, Tim, is allergic to lactose. It is close to christmas and Sylvia has chosen some recipes for christmas evening. Because she wants high quality products, she goes to a special supermarket. She knows what kind of products she needs, so she just

follows her shopping list. Arrived in the supermarket, she notices the store has digital price tags, which not only show the price, but also show allergens.One of Sylvia’s recipes requires cream as the base of the sauce. She finds cooking cream, but she is not sure if it is lactose-free. The price tag of the product tells Sylvia it contains a high concentration of lactose, so she can’t use it for the sauce. Fortunately, Sylvia sees she can press the lactose icon, and when she does, the price tag displays some good alternatives along with their location in the store. She gets the alternative product and continues shopping.

MartijnAssignment BScenario:Petra Peeters has always enjoyed going to the supermarket. But she finds it difficult since she got a kid with food allergies. When she is shopping, she needs to be continuously aware of what she buys for her child. When she enters the store her view is flooded with packages that scream for attention. When she sees an interesting product for the new recipe she wants to try, she can hardly read the back of the packaging. After quite a struggle she finally managed to read the packaging. She concludes from this that she can’t give this food to her child because he is allergic to it. After trying to look for an alternative for the ingredient she finally found it, but it has costed her a lot of time that she didn’t want to spend on it, because she hates to spend her time inefficiently.

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BatugAssignment BScenario:Mary (35) is the mother of Aron (8) who is allergic to peanuts, she found out 2 years ago about the allergic reaction her son has to peanuts and relatives. The process after she found out the allergic situation was harder than she thought according to her, because her son was like the most kids attracted to the packaging of sweat stuff. The attraction of her son was making her tired because Aron did not want to understand the fact that he could not eat those products.

Now he starts to understand but still the grocery list are taking long to prepare because Mary likes to cook different meals. She read something about a design that a supermarket is going to use which can solve her present problems, and she decides to visit this supermarket to do her groceries. The list that she prepared this time was not checked at home before, and when she arrives at the supermarket she picks one of these designs which has a screen and a scanner on it. The design scans the products barcode and gives immediately information about the ingredients and which allergenic has to be careful while using this product. This solved the biggest issue that she had while cooking food, now she feels really secure while doing groceries and saves more time while preparing the grocery lists.

Bianca Assignment C1. The system lies in a charging rack at the entrance of the store.2. The user takes the system out of the rack.3. The system prompts a “username and password” box on the screen.

4. The user fills in their personal username and password.5. The system checks whether the entered username and password are compatible. (If no: system returns to step 3) (If yes: system continues to step 6)6. The system retrieves the preinstalled information that is linked to the entered account.7. The system gives a “ready” prompt on the screen.8. The user scans a product by holding down the trigger on the system and holding the product in front of the red scanning strip.9. The system scans the product and retrieves information about the product from the database.10. The system checks whether the product contains allergens the user has filled in. (If no: screen shows product name and flashes green) (If yes: screen shows product name, name of allergen it contains that is not compatible with the users preferences, and flashes red)11. The user puts the food in their cart if the screen flashed green, or puts the product back on the shelf if the screen flashed red. (Repeat steps 8 to 11 until user has all their desired products)12. The user presses “pay” on the system and pays for the products at the end of the store.13. The user puts the system back into the charging rack and goes home with the groceries.14. The system resets to step 1.

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MathiasAssignment C1. The system shows the price and allergens of a product2. The user can see this information without interacting3. The user clicks on an allergen icon5. The system shows the concentration (low, medium, high) and alternatives The user clicks on an alternative6. The system shows the price, allergens and location of the alternative7. The user walks awayThe system returns to the default screen (1) after ‘x’ seconds without user input. MartijnAssignment C1. The user passes by the product.2. The user will be looking at the product.3. The system will analyse the allergies of the person from the database.

4. The system will check if the user can eat the product, and displays the allergens.5. The user will see the allergens that are in the product relevant to him.6. The user will buy the groceries more effectively.

BatugAssignment C1. The user scans the product by using the device. 2. The device displays the ingredients of the product.3. The user observes the information that is displayed.4. The user decides whether she buys the product or not.5. The user feels more secure while doing groceries.

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Appendix week 5

Individual task descriptions

BiancaAssignment BDetailed use case: Doing groceries with personalisable self scanner, nr. 2

1. The system lies in a charging rack at the entrance of the store.2. The user takes the system out of the rack.3. The system prompts a “Scan bonus card” box on the screen.4. The user puts their bonus card on the scanner.5. The system checks whether the bonus card is valid. (If no: system returns to step 3) (If yes: system continues to step 6)6. The system retrieves the preinstalled information that is linked to the bonus card.7. The system gives a “scan product” prompt on the screen, to show it is ready.8. The user scans a product by holding down the trigger on the system and holding the product in front of the red scanning strip.9. The system scans the product and retrieves information about the product from the database.10. The system checks whether the product contains allergens the user has filled in. (If no: screen shows product name and flashes green) (If yes: screen shows product name, name of allergen it contains that is not compatible with the users preferences, and flashes red)11. The user puts the food in their cart if the screen flashed green, or puts the product back on the shelf if the screen flashed red. (Repeat steps 8 to 11 until user has all their desired products)12. The user puts the system in the

holder (which triggers the screen to show all the products) and pays for the products at the end of the store.13. The user puts the system back into the charging rack and goes home with the groceries.14. The system resets to step 1.

MathiasAssignment BDetailed use case: Doing groceries with personalisable self scanner, nr. 2

1. The system shows the login screen for the bonus card2. The user scans their bonus card3. The system shows the shopping cart and “add product” button4. The user presses the “add product” button5. The system shows the camera display6. The user scans a product7. The system shows the scanned product8. The user presses “Add product” again9. The item is placed in the shopping cart10. The system shows the shopping cart11. The user presses “Checkout”12. The system tells the user to place the device in the charger13. The data is transferred to the payment terminal14. The user pays

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MartijnAssignment BDetailed use case: Doing groceries with personalisable self scanner, nr. 2

1. The SYSTEM is charging2. The USER takes the SYSTEM out of the charging base3. The SYSTEM asks for a bonus card4. The USER scans the bonus card5. The SYSTEM accepts it and shows this to the USER6. The USER scans a product7. The SYSTEM checks If the product contains any allergens and Tells the USER If it’s safe or not 8. The USER sees that He can’t eat the product and removes it from his shopping list9. The SYSTEM removes it from his shopping list10. The USER pays for his groceries and puts the SYSTEM back to it’s charging base11. The SYSTEM restarts.

BatugAssignment BDetailed use case: Doing groceries with personalisable self scanner, nr. 2

1. The System is charging and available at the entrance of the supermarket.2. The User takes the System at the entrance.3. The User scans the bonuscard.4. The System connects to the bonuscard.5. The Systems is ready to scan a product.6. The User scans the product by holding the System down and aimed to the barcode.7. The System scans the product and gets information from the database about it.

8. The Systems checks whether the product contains allergens or not. The System warns if it contains allergens.9. The User decides to take the product or not according to the Systems outcome.10. The User goes to the counter and finalize the purchase of the products.11. The User puts the system in its charging rack.

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Appendix week 6

Cognitive WalkthroughQuestions:1. Is the effect of the current action the same as the user’s goal?2. Is the action visible?3. Will the user recognize the action as a correct one?4. Will the user understand the feedback?

Answers for each screen (comments where necessary): See table on next page

Heuristic Evaluation1. Visibility of system status. The status of the system is not displayed continuously. However the warning text is continuously displayed when the user clicks on the product that can cause an allergic reaction. 2. Match between system and real world. The system is not hard to understand, it is made in a simple way so after using it once getting used to it is easy. The go back button is at a place that will take time to understand that it is actually taking the user to the previous page.3. User control and freedom. The freedom of the user is limited in the app, because most of the pages are following each other. The user is able to unselect an item, but not able to undo or redo. To redo or undo the user needs to go through the whole system again.4. Consistency and standards. The system is a standard system that doesn’t make the user feel surprised because it is a simple system.5. Error prevention. The system doesn’t display any warning messages on the screen unless the scanned product is a product that can create health problems.

It does not prevent the user by doing unwanted actions, but it gives small warnings that the person can overcome those.6. Recognition rather than recall. The icons that are used are really clear, but the home button is not really clear which can be improved. Another button that needs an improvement is the product info button, it needs to be more clear to overcome issues.7. Flexibility and efficiency of use. The system is really simple and because of this the system doesn’t give any experience users shortcut.8. Aesthetic and minimalist design. The interface is very minimalistic, the use of colors are very simple for example; If a product contains any allergens and is a risk for the user it is shown in the interface with a red color which makes it very clear that it is not allowed. The color that has to be checked again is the light blue color in order to make it easier to read.9. Recognize and recover from errors. The error messages are missing in the way of popping up on the screen, but the warnings that are given in the system are really clear. Since it also show the alternative products, it recovers from errors.10. Help and documentation. Since the system is simple enough to use, there is no need for any help.

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1 2 3 4Login Screen Yes Yes No, the sys-

tem does not clearly stat that the user was logged in.

No, the sys-tem does not clearly stat that the user was logged in.

Scanning Product Yes Yes Yes, because a camera screen is shown

Yes

Finding Product Info

Yes No, it is not clear that pressing the product will show information

Yes, because the informa-tion is shown after the ac-tion

Yes

Deleting a product Yes Yes, but very small

Yes, but per-haps a confir-mation screen would be good

Yes

Adding Alterna-tives

Yes Yes, but very small

Yes Yes

Going to the ho-mescreen

Yes No, currently the logo is the home screen button. This is not clear for users.

Yes Yes

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Appendix week 7Consent form

ResearchWith this research we are trying to gain insight in the way how users will be interacting with our app interface. You will be asked to perform some tasks on our interface. After that you will be asked some questions about the interface.

PermissionI hereby indicate that I voluntarily participate in this research on interaction techniques, which is executed by ___________________________ . The research consists of executing a finite amount of interactions according to instructions given by the researcher and displayed on the screen. I understand that I am not responsible for any damage or defects that might occur. I understand that the risks I take during this research are no additions to risks I take every day. I understand that for research purposes movement data is recorded during the study. I hereby give permission to use this data to evaluate the study.I also give permission to be recorded on a photograph or video. I understand that this media is use by the researchers to revisit the study at hand. I give permission that media in which I am unrecognisable could be used in publications and presentations to be visible for a limited audience. I understand that my answers on the questions will be documented and used in the reports. I understand that the data will be anonymized, after which it will not be possible to trace back to my participation. I understand that my name will never be named in reports of this research.

Participation I understand that participation is voluntarily. With any question I do not want to answer I have the right not to answer. I can refrain from participation at any moment. Abstinence from my participation in this study has no effect on the relationship with the researchers. I have been given the opportunity to ask any questions I have regarding the study before participation.

Contact If you have any questions during or after the study feel free to contact the researchers at any time given. The first contact is___________________________ , reachable at ___________________________.I have read and understood the above:Signature ___________________________________________ Date______/_______/______ Name ___________________________________________

Agreement by researcher

Signature ___________________________________________ Date______/_______/______

59

Evaluation Criteria: Group mem-ber:Mathias

Group mem-ber:Bianca

Group mem-ber:Martijn

Group mem-ber:Batug

Attends group meeting(s) and arrives on time.

4 4 4 2

Contributes meaningful-ly to group discussion.

3 3 3 3

Completes group as-signment on time.

3 3 3 3

Prepares work in a quality manner.

4 4 3 3

Demonstrates a cooper-ative andsupportive attitude.

4 4 4 3

Contributes significantly to the success of the project.

4 3 3 2

TOTALS 22 21 20 16

Your name: Bianca Liefhebber

Write the name of each of your group members in a separate column. For each person (including yourself), indicate the extent to which you agree with the state-ment on the left, using a scale of 1-4 (1=strongly disagree; 2=disagree; 3=agree; 4=strongly agree). Total the numbers in each column.

Group Reflections

60

Evaluation Criteria: Group mem-ber:Mathias

Group mem-ber:Bianca

Group mem-ber:Martijn

Group mem-ber:Batug

Attends group meeting(s) and arrives on time.

4 4 3 2

Contributes meaningful-ly to group discussion.

4 4 4 3

Completes group as-signment on time.

3 4 3 2

Prepares work in a qual-ity manner.

4 4 4 3

Demonstrates a cooper-ative andsupportive attitude.

4 4 3 3

Contributes significantly to the success of the project.

3 4 3 3

TOTALS 22 24 20 16

Your name: Mathias Verheijden

Write the name of each of your group members in a separate column. For each person (including yourself), indicate the extent to which you agree with the state-ment on the left, using a scale of 1-4 (1=strongly disagree; 2=disagree; 3=agree; 4=strongly agree). Total the numbers in each column.

61

Your name: Martijn ten Brinke

Write the name of each of your group members in a separate column. For each person (including yourself), indicate the extent to which you agree with the state-ment on the left, using a scale of 1-4 (1=strongly disagree; 2=disagree; 3=agree; 4=strongly agree). Total the numbers in each column.

Evaluation Criteria: Group mem-ber:Mathias

Group mem-ber:Bianca

Group mem-ber:Martijn

Group mem-ber:Batug

Attends group meeting(s) and arrives on time.

4 4 3 3

Contributes meaningful-ly to group discussion.

4 4 4 4

Completes group as-signment on time.

3 4 4 3

Prepares work in a qual-ity manner.

4 4 3 3

Demonstrates a cooper-ative andsupportive attitude.

4 4 4 4

Contributes significantly to the success of the project.

4 4 3 3

TOTALS 23 24 21 20

62

Evaluation Criteria: Group mem-ber:Mathias

Group mem-ber:Bianca

Group mem-ber:Martijn

Group mem-ber:Batug

Attends group meeting(s) and arrives on time.

4 4 4 3

Contributes meaningful-ly to group discussion.

4 4 3 3

Completes group as-signment on time.

3 4 4 3

Prepares work in a qual-ity manner.

4 4 3 3

Demonstrates a cooper-ative andsupportive attitude.

4 4 4 3

Contributes significantly to the success of the project.

3 4 3 3

TOTALS 22 24 21 18

Your name: Batug Karaman

Write the name of each of your group members in a separate column. For each person (including yourself), indicate the extent to which you agree with the state-ment on the left, using a scale of 1-4 (1=strongly disagree; 2=disagree; 3=agree; 4=strongly agree). Total the numbers in each column.