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| Criterion |  UX Research User Interviews |  Decision Making Trade-off Analysis |  Architecture Architecture Decision Record |
|---|---|---|---|
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. | With limited resources, quality, speed, cost, and risk almost always compete with each other. Trade-off Analysis makes these tensions explicit and prevents decisions from producing hidden side effects. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. |
Complexitydifferent | Low | Medium | Low |
Timedifferent | 30–60 min per interview | 45-120 min | 15-45 min |
Participantsdifferent | 1 participant per interview | 2-8 | 1-3 |
Formatdifferent | Workshop + async | Workshop + async | Async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Trade-off Matrix, Criteria List, Decision Rationale, Accepted Downsides | ADR File, Decision Log, Rationale |
Tagsno overlap | QualitativeResearchCustomerDiscovery | TradeoffsDecisionCriteriaOptions | ArchitectureRationaleDocumentationGovernance |
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