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| Criterion |  UX Research User Interviews |  Decision Making Constraint Analysis |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|---|
Purposedifferent | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | When an initiative stalls, the limit often lies not in the idea but in hard or soft boundary conditions. Constraint Analysis separates these limits and shows which of them can actually be shaped. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. |
Complexitydifferent | Low | Low | High |
Timedifferent | 30–60 min per interview | 30-90 min | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 1 participant per interview | 2-8 | Evaluation team, architects, and relevant stakeholders |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Constraint List, Hard/Soft Classification, Option Impact Notes, Decision Boundaries | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations |
Tagsno overlap | QualitativeResearchCustomerDiscovery | ConstraintsDecisionPlanningOptions | ArchitectureQualityRiskTradeoffsStakeholders |
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