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| Criterion |  Engineering Fault Isolation |  Operations Fishbone Diagram |  Architecture Architecture Decision Record |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | 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. | 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. | 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. |
Complexitydifferent | Medium | Low | Low | High |
Timedifferent | 30-180 min | 30-60 min | 15-45 min | 1-6 Wochen |
Participantsdifferent | 1-6 | 2-8 | 1-3 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Fishbone Diagram, Cause Categories, Investigation Backlog | ADR File, Decision Log, Rationale | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | TroubleshootingDiagnosisEngineering | Root causeQualityOperations | ArchitectureRationaleDocumentationGovernance | QualityProblem solvingRoot cause |