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| Criterion |  Operations Change Analysis |  Architecture Request for Comments |  Operations Barrier Analysis |  Architecture Architecture Decision Record |
|---|---|---|---|---|
Purposedifferent | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | 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. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 45-120 min | 1-3 Wochen vom Draft bis zur Entscheidung | 2-4 h | 15-45 min |
Participantsdifferent | 2-6 | 3-20 Reviewer | 2-6 | 1-3 |
Formatdifferent | Workshop + async | Async | Workshop + async | Async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | ADR File, Decision Log, Rationale |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | ArchitectureDecisionAsyncGovernance | Root causeSafetyIncident | ArchitectureRationaleDocumentationGovernance |