sbd: activity design
DESCRIPTION
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 PresentationTRANSCRIPT
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SBD: Activity DesignCS 3724 - HCIChris North
Usability Engineering - Chapter 3
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Hall of Fame/Shame Presentations
• http://courses.cs.vt.edu/~cs3724/fall2006/schedule.html
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HW#1 Revisited
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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
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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
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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
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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
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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
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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
+/-
+/-
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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
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Designer’s Model User’s Mental Model
Cashier
Systematic, logical,comprehensive
Ad hoc, informal, incomplete
The Web
Cart
+ -
Metaphors bridge the gap
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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
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The Morphological Box
Identify dimensions of the design space
Enumerate all possible solutions
PBJ sandwich, on whole wheat, no butter
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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”
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Grocery shopping?
• Soccer mom:•
• Shopping cart:•
• Shelves/Aisles:•
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metaphors
•
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new scenario
• Online grocery?• Soccer mom:
•
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The Morphological Box
Identify dimensions of the design space
Enumerate all possible solutions
PBJ sandwich, on whole wheat, no butter
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Grocery shopping?
•
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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
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Execution
Action plan
Systemgoal
Last month’sbudget... ?
Interpretation
PerceptionMakingsense
GULF OFEVALUATION
GULF OFEXECUTION
Stages of Action in HCIInformationdesign
Interactiondesign
Human-computer
interaction
Taskgoal
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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
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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!