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| Criterion |  Architecture Request for Comments |  Architecture Architecture Decision Record |  Architecture C4 Model |  Decision Making DACI |
|---|---|---|---|---|
Purposedifferent | An RFC clarifies architecture context, options, and consequences. It structures technical context, alternatives, tradeoffs, open questions, and review feedback, and captures the result as an RFC document, reviewer comments, and a decision rationale. | 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. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. | 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 | Medium | Low | Low | Low |
Timedifferent | 1-3 Wochen vom Draft bis zur Entscheidung | 15-45 min | 1-4 h | 30-60 min |
Participantsdifferent | 3-20 Reviewer | 1-3 | 1-5 | 2-10 |
Formatdifferent | Async | Async | Workshop + async | Workshop + async |
Outputdifferent | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets | ADR File, Decision Log, Rationale | Context Diagram, Container Diagram, Component Diagram | DACI Matrix, Decision Owner, Decision Log |
Tagsno overlap | ArchitectureDecisionAsyncGovernance | ArchitectureRationaleDocumentationGovernance | ArchitectureCommunicationVisualization | DecisionRolesGovernanceAlignment |