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| Criterion |  Operations A3 Problem Solving |  Architecture Request for Comments |  Operations Failure Mode and Effects Analysis |  Operations Fishbone Diagram |
|---|---|---|---|---|
Purposedifferent | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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 process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 45-90 min | 1-3 Wochen vom Draft bis zur Entscheidung | 2-6 h | 30-60 min |
Participantsdifferent | 2-5 | 3-20 Reviewer | 3-10 | 2-8 |
Formatdifferent | Workshop + async | Async | Workshop | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets | FMEA Table, Risk Priority, Mitigation Actions | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | LeanProblem solvingCoachingOperations | ArchitectureDecisionAsyncGovernance | RiskQualityOperationsRoot cause | Root causeQualityOperations |