DESIGN REVIEW DESIGN REVIEW Mason Verbridge Evan McNamara Steve Fleischmann Artem Sivak P11032 System P11032 Outline Objectives Work Breakdown List of Customer Needs System Specifications Concept Selection Flow-down Concept Selection Matrices Form Factor / Concept Topologies Alternative Usage Layouts Benchmarks and Input Going Forward Wrap-up 2 P11032 Objectives Obtain input and direction (from all stakeholders) regarding the process and selection of a final concept, as well as suggestions on our current form factor. 3 P11032 Work Breakdown Structure 4 P11032 Customer Needs Initial Needs Outlined With Customer Needs Prioritized and Refined by Customer. 5 Priority High Low P11032 System Specifications Specifications were developed to meet and/or exceed customer needs. Each specification is quantifiable and testable Actual test plan / test specification to be constructed at a later date 6 P11032 Concept Selection Flow-down (See Appendix B) Initial Selection Table Narrowed 10 concepts to 5 Using Pugh Chart Concepts -> HOQ, graded vs. weighted specs Narrowed to 3 conceptsAnalyzed against risksCurrent Concept 7 P11032 Concept Selection/Generation 8 P11032 Concept Selection/Generation 9 P11032 Concept Selection/Generation 10 P11032 Benchmarks, Input, and the Bottom Line David M. - Right now I usually have someone else press the "next" button but it gets annoying having to give them a cue, not to mention it detracts from the smoothness of the presentation. This is of course unless the "button presser" is a teammate I've practiced with and they know WHEN to click- and in that case its not always perfect since when I'm spontaneous and add more information than we had rehearsed they may mistakenly jump ahead to the next slide. Avi H. If it's the size and weight of a watch, it won't hinder my signing at all. Adam N. I've never presented an entire presentation in ASL because I've always talked Lately, I've been signing a lot more and trying not to talk as much either A wristband actually sounds extremely nice. Greg B. Currently, there are two ways I can do a presentation. 1) Have a volunteer stand at the computer waiting for my signal to change the slides. 2) Pause at every slide to change it myself, either using the computer or picking up a wireless remote. It would definitely be nice to streamline the experience. [ A wristband] would work very well, and would not be distracting as long as the profile is small/slim. Emily S. [A wristband would work] since I pretty much always have something on my wrist no matter what. Its clear to see that implementing a wrist-based solution would be highly useful to ASL users! 11 P11032 Questions, Comments, Concerns? 12 P11032 Form Factor Thus far four basic layouts have been examined. They are as follows... 13 P11032 Concept 1 Pros: Out-of-the-way side- mounted switch Cons: Possible interference with clothing Size (depth of switch) Left vs. Right hand interference 14 P11032 Concept 2 15 Pros: Intuitive Cons: Possible False Triggers Requires finger dexterity P11032 Concept 3 16 Pros: Quick trigger method Intuitive Usability for dexterity impaired Cons: Possible False Triggers Switch Sensitivity Size (depth of switch) P11032 Concept 4 17 Pros: Reduction of False Triggers Intuitive Usability for dexterity impaired Cons: Bulky Moving Parts (long term reliability) Possibly Fragile P11032 Possible Feature Expansion Features may be added, at the expense to overall device size Feature selection will be driven by customer input Laser Pointer Start Presentation Button Mouse Control Volume Control 18 P11032 Concept Review 19 P11032 Alternative Usage Surfaces 20 A C B B C P11032 Thoughts and Discussion Likes? Dislikes? Comments? Concerns? 21 P11032 Recap Concept Discussion Overview User Interface Discussion Overview 22 P11032 Going Forward Gantt Chart / Project Plan (Appendix D) Feasibility Studies Test Plan Prepare for week 9 design review Risk Assessment (Appendix C) 23 P11032 Thank You For Your Time! 24 P11032 Risk Assesment 25 P11032 Power Consumption Assumptions & What We Know System will only work down to 2.4V. (No noticeable fall-off in testing up to this point) The system is constantly drawing 10mA of current a vast safe margin. The above makes it clear that the unit is continuously utilizing 30mW of power. Minimally sized watch/hearing aid batteries estimate a lifetime of 150 mili-Amp Hours. This means that even an extremely small battery will give us 15+ hours of usability! What We Have System Runs on 3V, provided via two AAA batteries. Testing has shown that the unit will run without major issue until approximately 2.2V. (Laser pointer begins to dim, but no other effects) Further analysis shows that the unit will consume a maximum of ~7mA. Max current condition occurs on button press when laser pointer is active. Idle system consumes current on the order of A. 26 P11032 Gantt Chart 27 P11032 House Of Quality 28 P11032 House Of Quality 29