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SBD: Activity Design. CS 3724 - HCI Chris North. Usability Engineering - Chapter 3. Hall of Fame/Shame Presentations. http://courses.cs.vt.edu/~cs3724/fall2006/schedule.html. HW#1 Revisited. ANALYZE. analysis of stakeholders, field studies. claims about current practice. - PowerPoint PPT Presentation
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SBD: Activity DesignCS 3724 - HCIChris North
Usability Engineering - Chapter 3
Hall of Fame/Shame Presentations
• http://courses.cs.vt.edu/~cs3724/fall2006/schedule.html
HW#1 Revisited
Problem scenarios
summativeevaluation
Information scenarios
claims about current practice
analysis ofstakeholders,field studies
Usability specifications
Activityscenarios
Interaction scenarios
iterativeanalysis ofusability claims andre-design
metaphors,informationtechnology,HCI theory,guidelines
formativeevaluation
DESIGN
ANALYZE
PROTOTYPE & EVALUATE
Summaries: stakeholder, task, and artifact analyses, general themes
Root concept: vision, rationale,assumptions, stakeholders
Problem scenarios:illustrate and put into context the tasks and themes discovered in
the field studies
Claims analysis:find and incorporate features of practice
that have key implications for use
Field studies: workplace observations,recordings, interviews, artifacts
SBD andRequirementsAnalysis
Problem scenarios
summativeevaluation
Information scenarios
claims about current practice
analysis ofstakeholders,field studies
Usability specifications
Activityscenarios
Interaction scenarios
iterativeanalysis ofusability claims andre-design
metaphors,informationtechnology,HCI theory,guidelines
formativeevaluation
DESIGN
ANALYZE
PROTOTYPE & EVALUATE
Functionality
Look and feel
product data
browsing
searching
ordering
payment
customer data
SYSTEM
FUNCTIONALITY
LOOK & FEEL
iconslinks
menus
layout
navigationlabels
fields
security
feedback
The Two Faces of HCI Design
Activity Design
Information & Interaction
Design
Problem scenarios: work from current practice to build new ideas
Activity design scenarios:transform current activities to
use new design ideas
SBD: Activity Design
• Transform old activities to new activities that use technology
• Focus on system “what”,not “how” (why?)“conceptual design”, “task-level
design”
• Focus on improvements• Iterative
Goal: work from problems and opportunities of problem domain to envision new activities
Problem scenarios: work from current practice to build new
Activity design scenarios:transform current activities to
use new design ideas
Claims analysis: identify, illustrate, and document design features with key implications
Activity design space:
brainstorm implications of metaphors and
technology
Problem claims: look for design
ideas that address negatives, but keep positives
HCI knowledge
about activity design
SBD:ActivityDesign
+/-
+/-
Envisioning new activities
• Effectiveness: meets users’ needs• Innovative technology vs. tried-and-true• Generality vs. specific tasks
• Comprehension: understandable, predictable
• Mental models• Metaphors
• Satisfaction: accomplishment, motivating• Automation vs. control • Individual vs group needs
Designer’s Model User’s Mental Model
Cashier
Systematic, logical,comprehensive
Ad hoc, informal, incomplete
The Web
Cart
+ -
Metaphors bridge the gap
Activity design process
1. Design alternatives• Focus on fixing -’s, preserving +’s• Informal methods:
– Brainstorm– Try metaphors– Apply technologies– Explore “what if”s, Be creative, out of the box
• Systematic methods:– Identify design space -- Morphological Box
2. Rework scenarios with new design ideas• Participatory design• Coherence, completeness
3. Track claims• +/-, rationale
4. Iterate
The Morphological Box
Identify dimensions of the design space
Enumerate all possible solutions
PBJ sandwich, on whole wheat, no butter
Brainstorming
Developed in response to “group think” Basic rules:
Someone keeps list so everyone can see No idea is too wild No evaluation Silence does not mean “DONE”
Fun and “light weight”
Grocery shopping?
• Soccer mom:•
• Shopping cart:•
• Shelves/Aisles:•
metaphors
•
new scenario
• Online grocery?• Soccer mom:
•
The Morphological Box
Identify dimensions of the design space
Enumerate all possible solutions
PBJ sandwich, on whole wheat, no butter
Grocery shopping?
•
Problem scenarios
summativeevaluation
Information scenarios
claims about current practice
analysis ofstakeholders,field studies
Usability specifications
Activityscenarios
Interaction scenarios
iterativeanalysis ofusability claims andre-design
metaphors,informationtechnology,HCI theory,guidelines
formativeevaluation
DESIGN
ANALYZE
PROTOTYPE & EVALUATE
Execution
Action plan
Systemgoal
Last month’sbudget... ?
Interpretation
PerceptionMakingsense
GULF OFEVALUATION
GULF OFEXECUTION
Stages of Action in HCIInformationdesign
Interactiondesign
Human-computer
interaction
Taskgoal
Homework #2
• Due Thurs• Study Usability Case library
• Garden.com• Requirements analysis
• Create an HTA for planning a garden• Use existing analysis – stuff you didn’t know• Add own/friends’ knowledge• Hierarchical decomposition• Be thorough
Project Step 2 – Reqmts Analysis
• Due next Thurs• Do the UE process
• Identify stakeholders• Observe, interview, survey• Analyze data• Develop representations
• Users• Problem scenarios• Claims • What’s the REAL problem? Remember
Glenn Fink!
