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| Criterion |  Operations Change Analysis |  Architecture Request for Comments |  Systems Thinking Current Reality Tree |  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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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 | High | Low |
Timedifferent | 45-120 min | 1-3 Wochen vom Draft bis zur Entscheidung | 2-6 h | 15-45 min |
Participantsdifferent | 2-6 | 3-20 Reviewer | 3-8 | 1-3 |
Formatdifferent | Workshop + async | Async | Workshop | Async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets | Current Reality Tree, Core Problems, Intervention Ideas | ADR File, Decision Log, Rationale |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | ArchitectureDecisionAsyncGovernance | Systems thinkingRoot causeConstraintsCausality | ArchitectureRationaleDocumentationGovernance |