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| Criterion |  Innovation Double Diamond |  Architecture Architecture Decision Record |  Decision Making DACI |  Architecture arc42 |
|---|---|---|---|---|
Purposedifferent | For complex problems with a fuzzy situation, the method cleanly separates search space and decision. It first creates breadth in understanding and then focus in elaboration. This brings open questions, problem definition, and solution path into a traceable movement. | 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. | 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. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | Wochen bis Monate | 15-45 min | 30-60 min | 1-2 Tage |
Participantsdifferent | 3-12 | 1-3 | 2-10 | 1-4 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | ADR File, Decision Log, Rationale | DACI Matrix, Decision Owner, Decision Log | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | ProcessDivergenceInnovation | ArchitectureRationaleDocumentationGovernance | DecisionRolesGovernanceAlignment | ArchitectureDocumentationCommunication |