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| Criterion |  Operations Change Analysis |  Delivery RAID Log |  Engineering Fault Isolation |  Operations Fault Tree Analysis |
|---|---|---|---|---|
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. | Helps clarify scope, sequence, and delivery flow in concrete terms. It makes work, boundaries, and order steerable. The result is captured as a RAID Log and a source for status reporting. | 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. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 45-120 min | 30 min Setup, dann laufend | 30-180 min | 2-6 h |
Participantsdifferent | 2-6 | 1-3 maintaining, briefing for everyone | 1-6 | 3-8 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | RAID Log, Status Report Source | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | RiskTrackingStakeholdersGovernance | TroubleshootingDiagnosisEngineering | RiskRoot causeSafety |