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| Criterion |  Architecture Architecture Decision Record |  Knowledge Modeling IBIS |  Architecture Request for Comments |  Decision Making Decision Rights Mapping |
|---|---|---|---|---|
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. | IBIS structures thinking about complex questions as a sequence of issues, ideas, and arguments. The method keeps discussions open without forcing them into premature consensus. | 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. | 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 | Medium | Medium | Medium |
Timedifferent | 15-45 min | 1-3 h | 1-3 Wochen vom Draft bis zur Entscheidung | 90-180 min |
Participantsdifferent | 1-3 | 2-8 | 3-20 Reviewer | 4-12 |
Formatdifferent | Async | Workshop + async | Async | Workshop |
Outputdifferent | ADR File, Decision Log, Rationale | Issue Map, Positions, Argument Notes | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets | Decision Rights Matrix, Agreement |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | RationaleKnowledgeDecision | ArchitectureDecisionAsyncGovernance | DecisionGovernanceAlignmentResponsibility |