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| Criterion |  Architecture Architecture Decision Record |  UX Research User Interviews |  Decision Making RAPID |  Decision Making DACI |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | In complex management decisions, clarity is often missing about who recommends, who agrees, and who makes the decision. RAPID creates this assignment and stabilizes decisions across several levels. | In cross-functional decisions, responsibilities quickly blur between approval, influence, and execution. DACI arranges these roles so decision pressure, contribution, and information stay cleanly separated. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 15-45 min | 30–60 min per interview | 45-90 min | 30-60 min |
Participantsdifferent | 1-3 | 1 participant per interview | 3-12 | 2-10 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Interview Notes, Themes, Insight Summary | RAPID Role Map, Recommendation, Decision Log | DACI Matrix, Decision Owner, Decision Log |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | QualitativeResearchCustomerDiscovery | DecisionRolesGovernance | DecisionRolesGovernanceAlignment |