SBD: Analyzing Requirements

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Presentation transcript:

SBD: Analyzing Requirements Chris North CS 3724: HCI

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Information scenarios 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

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

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

SBD and Requirements Analysis P1 Root concept: vision, rationale, assumptions, stakeholders SBD and Requirements Analysis P1 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

Field Studies Observation Interviews Questionnaires 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

Observation Interview Questionnaire Goal Method # Users Tools Data Depth Effort E.g.

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?

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

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

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

Project Part 1, due Thurs: teams & topics Root Concept Part 2, due in 2 weeks: Requirements Analysis Your mission: find out about your users Who are they? What matters to them? What are they trying to do? 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!

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