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| Criterion |  Operations 8D Problem Solving |  Architecture Architecture Decision Record |  Operations Fishbone Diagram |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | 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. | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | High | Low | Low | Medium |
Timedifferent | 1-6 Wochen | 15-45 min | 30-60 min | 1-4 h |
Participantsdifferent | 4-10 | 1-3 | 2-8 | 3-8 |
Formatdifferent | Workshop + async | Async | Workshop | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | ADR File, Decision Log, Rationale | Fishbone Diagram, Cause Categories, Investigation Backlog | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | QualityProblem solvingRoot cause | ArchitectureRationaleDocumentationGovernance | Root causeQualityOperations | Root causeProblem solvingQualityIncident |