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| Criterion |  UX Research User Interviews |  Decision Making DACI |  Architecture arc42 |  Decision Making Decision Rights Mapping |
|---|---|---|---|---|
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. | 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. | arc42 structures architecture knowledge so teams can document system, decisions, and risks consistently. The template builds a living understanding of the architecture instead of scattered notes. | In organizations with many stakeholders, it often blurs who actually decides and who is merely consulted. It separates options, evaluation criteria, and open risks. The result is captured as a Decision Rights matrix and an agreement. |
Complexitydifferent | Low | Low | Low | Medium |
Timedifferent | 30–60 min per interview | 30-60 min | 1-2 Tage | 90-180 min |
Participantsdifferent | 1 participant per interview | 2-10 | 1-4 | 4-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | DACI Matrix, Decision Owner, Decision Log | Architecture Document, Context View, Runtime View, Deployment View | Decision Rights Matrix, Agreement |
Tagsno overlap | QualitativeResearchCustomerDiscovery | DecisionRolesGovernanceAlignment | ArchitectureDocumentationCommunication | DecisionGovernanceAlignmentResponsibility |