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 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