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Early Design Process
Chris North
cs3724: HCI
Presentations
• mohamed hassoun, • aaron dalton
• Vote: UI Hall of Fame/Shame?
Today’s Excersize
• Design a pizza ordering system
Review• Step1:
• users• tasks
• Task profiling• Design principles and guidelines
• 5 HCI metrics• Shneiderman’s 8 golden rules• Nielsen’s 10 heuristics• Screen Layout
• 3 UI Styles:• dm• menus• com lang
Early Design Process• 1. Users and Tasks
• Interview users
• Ethnographic Observation
• Scenario development
• User, Task analysis
• Task profiling
• 2. Design• Participatory Design
• Shneiderman’s OAI: Map objects and actions
• 3 UI styles, guidelines, standards
• 3. Evaluate• Role Play
• Wizard of Oz
• Heuristic Evaluation
Interview Users
• Fast
• Cheap
• College students
Ethnographic Observation
• Watch users work
• Record, analyze
Scenario Development
• Write example scenarios of usage
• Frat boy throwing party, needs lots of pizza & beer, he wants variety, slurred speech.
User and Task Analysis
• Want pizza– 40% 2 person pizza, half/half– 10% Frat boy– Single user, simple meal: drink, how hungry?– Repetetive orders, every week, same as before,
variations– Family dinner, # people, aduls vs chidren
Task Profiling
Early Design Process• 1. Users and Tasks
• Interview users
• Ethnographic Observation
• Scenario development
• User, Task analysis
• Task profiling
• 2. Design• Participatory Design
• Shneiderman’s OAI: Map objects and actions
• 3 UI styles, guidelines, standards
• 3. Evaluate• Role Play
• Wizard of Oz
• Heuristic Evaluation
Participatory Design
• Users involved in designing UI• Good for very narrow user classes, tasks
• E.g. a scientific discipline that’s hard for designers to understand
• If user satisfaction is key
• Advantages:• cover users concerns
• Disadvantages:• Only covers concerns of participating users• Users don’t know HCI
Combo meal Combo mealCombo meal
peperoni
Whole, Half, quarter
$8.99
Early Design Process• 1. Users and Tasks
• Interview users
• Ethnographic Observation
• Scenario development
• User, Task analysis
• Task profiling
• 2. Design• Participatory Design
• Shneiderman’s OAI: Map objects and actions
• 3 UI styles, guidelines, standards
• 3. Evaluate• Role Play
• Wizard of Oz
• Heuristic Evaluation
Early Evaluation
• Role Play• Act out scenarios, gauge success
• Wizard of Oz• Real users
• Act out the system in response to users (don’t help them!)
• Paper, stickies, blackboard, …
• Heuristic Evaluation• Measure against 5 metrics, Shneiderman’s 8, Neilsen’s 10,
Fitt’s law, …
Next
• Hw2:• A-K: due today!
• L-Z: due thurs
• Midterm: feb 26
• Proj 2: design due feb 28
Presentations: proj1 design or UI critique
• Thurs: nadine edwards, steve terhar
• Next Tues: midterm
• Next Thurs: peter hou
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