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Home Mess System III
1. Home-Mess System Presentation III: Evaluation of Prototype IArundhati, Ihab, Ibrahim, Fareed, Zain
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3. The earlier we start testing, the better the testing strategy, the better the test coverage, the sooner we can reveal the flaws and address them.
4. Uncovering a flaw when a solution is still in early construction phases is a reasonably cost effective and easy flaw to resolve “TESTING” THE MOMENT OF TRUTH Introduction Source- http://blogs.msdn.com/willy-peter_schaub
8. Exploitation of evaluations results and outcomes for improving system layout and architecture “Reaching a deeper understanding of the users' expectations and impressions of the system.”
14. User Testing Cognitive Walkthrough FIELD THEORY TRIANGULATION EXPERT Heuristic Evaluation
15. Theory Based- Cognitive Walkthrough Measure the usability aspect by collecting empirical data of task breakdown and recognizing the sequence/path taken by the user. Field Based- User Testing Observation of users in their home environment. A basic structure would be kept as a guideline. It’s a user centric approach Expert Based- Heuristic Evaluation Identify usability problems based on established human factors principles. The method will provide recommendations for design improvements.
17. The stages in a cognitive walkthrough and the dependencies between stages Preparation Phase Execution Phase
18. Task Based Walkthroughs- Approach Users Identified: what knowledge, skills, experience will they have? Tasks Identified: set of representative tasks sequence of actions needed to achieve each task
20. Predefined problem criteria User articulates a goal & cannot succeed in attaining it within 2 minutes User explicitly gives up User articulates a goal and has to try three or more actions to find a solution User produces a result different from the task given User expresses surprise User expresses some negative affect or says something is a problem User makes a design suggestion
21. KLM: Keystroke Level Model K Press a key or button P Point to a target on the display H Home hands on input device D Draw a line segment M Mentally prepare for an action R (system response time) KLM Operators:
23. Set task scenarios for user testing Recruit prospective users Record each session of testing Observe and Analyse data Follow up with a cooperative evaluation questionnaire Think aloud protocol : Approach
24. Task Scenario “Create a new task” To ascertain the path that the user would follow and their understanding of the system layout “Leave a direct message”To test the user’s intuition when no clear path has been defined. “Create a new event” “Check for reminders”
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26. Efficiency ( the level of resource consumed in performing tasks)
31. User Quotes “Good white space – links are obvious – clearly labeled – browsing divided very nicely – good subcategories.” “What is ‘camera’ icon for? It was the first choice I noticed.” “I think the designers have done well” “I don’t know which button to click with the options present in more that one place on the main screen.”