Early Design Process Chris North cs 3724 HCI

Early Design Process Chris North cs 3724: HCI

Presentations • mohamed hassoun, • aaron dalton • Vote: UI Hall of Fame/Shame?

Today’s Excersize • Design a pizza ordering system

Review • Step 1: • 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 Whole, Half, quarter $8. 99 peperoni

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 • Hw 2: • A-K: due today! • L-Z: due thurs • Midterm: feb 26 • Proj 2: design due feb 28 Presentations: proj 1 design or UI critique • Thurs: nadine edwards, steve terhar • Next Tues: midterm • Next Thurs: peter hou