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SBD: Analyzing Requirements

SBD: Analyzing Requirements. Chris North CS 3724: HCI. http://www.ok-cancel.com/. ANALYZE. analysis of stakeholders, field studies. claims about current practice. Problem scenarios. DESIGN. Activity scenarios. metaphors, information technology, HCI theory, guidelines.

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SBD: Analyzing Requirements

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  1. SBD:Analyzing Requirements Chris North CS 3724: HCI

  2. http://www.ok-cancel.com/

  3. ANALYZE analysis of stakeholders, field studies claims about current practice Problem scenarios DESIGN Activity scenarios metaphors, information technology, HCI theory, guidelines iterative analysis of usability claims and re-design Information scenarios Interaction scenarios PROTOTYPE & EVALUATE summative evaluation formative evaluation Usability specifications

  4. Analyzing Requirements • Goal: understand users’ current activities well enough to reason about technology-based enhancements • To meet real needs, you must identify the (hidden!) problems & desires

  5. Things to Identify Activities Social context People “users” “stakeholders” Artifacts

  6. Root concept: vision, rationale, assumptions, stakeholders SBD and Requirements Analysis Field studies: workplace observations, recordings, interviews, artifacts Summaries: stakeholder, task, and artifact analyses, general themes 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

  7. Field Studies • Observation • Ethnographic method: watch what they do in real world • Passive vs Active: • Contextual inquiry (ask during) • Participatory analysis (ask after, with video…) • Interviews • Structured or informal • Explicit vs Tacit knowledge • Questionnaires • Survey (demographics, skills, attitudes, utility, …) • Quantitative, statistical results

  8. Some suggestions on how to see • Leave your categories at home… • Forgetting is seeing things anew. • Listen • Talk • Reflect on what you’ve seen and heard • Does it make sense? • Can you tell a complete story?

  9. Representations of Results • How to represent the problem? • Scenarios • User profiles • Video, pictures, storyboard • HTA: hierarchical task analysis • …

  10. Example: Grocery Shopping • Users, artifacts, activities, social context • Claims • Problem Scenarios • HTA

  11. Usability Case Library • http://ucs.ist.psu.edu/

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