hci 510 : hci methods i user needs. hci 510: hci methods i user centered design - introduction...

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  • Slide 1
  • HCI 510 : HCI Methods I User Needs
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  • HCI 510: HCI Methods I User Centered Design - Introduction Usability User Centered Design - Process User Centered Design - Methods Affordances Normans Principles of User Centered Design
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  • Learning Objectives By the end of this class students should HCI 510: HCI Methods I
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  • User Centered Design - Introduction Usability User Centered Design - Process User Centered Design - Methods Affordances Normans Principles of User Centered Design
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  • HCI 510: Texts User-Centered Design. In Bainbridge, W., Encyclopedia of HCI. (Abras, C., Maloney-Krichmar, D., Preece, J., 2004) The Design Of Everyday Things (Norman, 1988).
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  • User Centered Design The design of everyday objects is not always intuitive and at times it leaves the user frustrated and unable to complete a simple task. How many of us have bought a VCR/TIVO/HDR that we have struggled to used and missed recording our favorite programs because we misunderstood the instructions or had to put up with the clock blinking 12:00 because we didnt know how to stop it? Do we have to put up with designs like these? Isnt it possible to design systems that are more usable?
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  • User Centered Design User-centered design (UCD) is a broad term to describe design processes in which end-users influence how a design takes shape. It is both a broad philosophy and variety of methods. There is a spectrum of ways in which users are involved in UCD but the important concept is that users are involved one way or another. For example, some types of UCD consult users about their needs and involve them at specific times during the design process; typically during requirements gathering and usability testing. At the opposite end of the spectrum there are UCD methods in which users have a deep impact on the design by being involved as partners with designers throughout the design process.
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  • User Centered Design The term User Centered Design originated in Donald Normans research laboratory at the University of California San Diego in the 1980s and became widely used after the publication of a co-authored book entitled: User-Centered System Design: New Perspectives on Human-Computer Interaction (Norman & Draper, 1986). Norman built further on the UCD concept in his seminal book: The Design Of Everyday Things (Norman, 1988). In this book he recognizes the needs and the interests of the user and focuses on the usability of the design.
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  • User Centered Design Norman offers four basic suggestions on how a design should be: Make it easy to determine what actions are possible at any moment. Make things visible, including the conceptual model of the system, the alternative actions, and the results of actions. Make it easy to evaluate the current state of the system. Follow natural mappings between intentions and the required actions; between actions and the resulting effect; and between the information that is visible and the interpretation of the system state.
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  • HCI 510: HCI Methods I User Centered Design - Introduction Usability User Centered Design - Process User Centered Design - Methods Affordances Normans Principles of User Centered Design
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  • Usability What is Usability ?
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  • Usability Usability is the degree to which something is easy to use and a good fit for the people who use it. It is a quality or characteristic of a product. It is whether a product is efficient, effective and satisfying for those who use it. It is the name for the techniques developed by usability professionals to help create usable products. It is a shorthand term for a process or approach to creating those products, also called user-centered design.
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  • Usability Definitions (1) Usability means that the people who use the product can do so quickly and easily to accomplish their own tasks. This definition rests on four points: (1)Usability means focusing on users; (2) People use products to be productive; (3)Users are busy people trying to accomplish tasks; and (4)Users decide when a product is easy to use.
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  • Usability Definitions (2) After all, usability really just means that making sure that something works well: that a person of average (or even below average) ability and experience can use the thing - whether it's a Web site, a fighter jet, or a revolving door - for its intended purpose without getting hopelessly frustrated.
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  • Usability Definitions (3) It is important to realize that usability is not a single, one-dimensional property of a user interface. Usability has multiple components and is traditionally associated with these five usability attributes: Learnability, Efficiency, Memorability, Errors, Satisfaction.
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  • Usability Definitions (4) Usability has an ISO standard (ISO 9241-11), where usability is defined as: effectiveness, efficiency and user satisfaction.
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  • Usability Rank the following Usability quotes in the order you see as most important. Enter a number for 1 to 6, in the boxes, with 1 being the most important.
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  • HCI 510: HCI Methods I User Centered Design - Introduction Usability User Centered Design - Process User Centered Design - Methods User Centered Design Questions Affordances Normans Principles of User Centered Design
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  • User Centered Design - Process Understanding who users are and what they are doing can and should be a critical component of any HCI investigation. The techniques and methods used to obtain user and task information come from usability engineering, which is a group of development methodologies that combine engineering, psychology, computer science and usability methodologies.
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  • User Centered Design - Process In broad terms, User Centered Design (UCD) is a design philosophy and a process in which the needs, wants, and limitations of end users of a product, interface or document are given extensive attention at each stage of the design process. User centered design can be characterized as a multi-stage problem solving process that not only requires designers to analyze and foresee how users are likely to use an interface, but also to test the validity of their assumptions with regards to user behaviour in real world tests with actual users. Such testing is necessary as it is often very difficult for the designers of an interface to understand intuitively what a first-time user of their design experiences, and what each user's learning curve may look like. Example : Texting
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  • User Centered Design - Process The chief difference from other interface design philosophies is that user-centered design tries to optimize the user interface around how people can, want, or need to work, rather than forcing the users to change how they work to accommodate the developers approach.
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  • User Centered Design - Process One of the international standards that is the basis for many UCD methodologies (ISO 13407: Human-centered design process) defines a general process for including human-centered activities throughout a development life-cycle, but does not specify exact methods.
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  • USER CENTRED DESIGN WORKSHEET 02 Put the text in the correct boxes to define the development life cycle Specify Requirements Evaluate Designs System Satisfies Specified Requirements Specify Context of Use Identify Need for Human Centered Design Produce Design Solutions
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  • User Centered Design - Process
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  • 1. Specify the context of use Identify the people who will use the product, what they will use it for, and under what conditions they will use it. 2. Specify requirements Identify any business requirements or user goals that must be met for the product to be successful.
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  • User Centered Design - Process 3. Create design solutions This part of the process may be done in stages, building from a rough concept to a complete design. 4. Evaluate designs The most important part of this process is that evaluation - ideally through usability testing with actual users - is as integral as quality testing is to good software development. User Centered Design - Introduction Usability
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  • User Centered Design - Models User Centered Design Models Cooperative Design: involving designers and users on an equal footing. This is the Scandinavian tradition of design of IT artifacts and it has been evolving since 1970. Participatory Design (PD): a North American term for the same concept, inspired by Cooperative Design, focusing on the participation of users. Since 1990, there has been a bi-annual Participatory Design Conference. Contextual Design: customer-centered design in the actual context, including some ideas from Participatory design
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  • User Centered Design - Process A Typical User Centered Design Methodology Most user-centered design methodologies are detailed in suggesting specific activities, and the time within a process when they should be completed. The following shows a typical UCD process. In this version, the UCD activities are broken down into four phases: 1.Ana


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