SBD: Analyzing Requirements
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Transcript of SBD: Analyzing Requirements
SBD:Analyzing Requirements
Chris North
cs3724: HCI
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
Analyzing Requirements
• Goal: understand users’ current activities well enough to reason about technology-based enhancements
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
Categories
• People
• Activities
• Artifacts
• Social context
The ethnographic method
Field studies, not lab experimentsComes from anthropologyGeneralize from the few and the particularIt’s just one possible method
Explicit vs tacit knowledge Approaches:
• Contextual inquiry (ask during)
• Participatory analysis (ask after)
Some suggestions on how to see
Leave your categories at home…Forgetting is seeing things anew.
ListenTalkReflect on what you’ve seen and heard
Does it make sense?Can you tell a complete story?
Representations
• How to represent the problem?
• Scenarios
• Video, pictures, storyboard
• HTA: hierarchical task analysis
Grocery Shopping
ProjectW/Th: teams & topics
2 weeks: Requirements AnalysisYour mission: find out about your users
• Who are they? • What matters to them?• What do they do in their work? • What is unexpected?• How do they now get to the information your project will
present to them?• What is the scenario of their current work practice?• Can you imagine alternate scenarios?
Start NOW!