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| Criterion |  Operations Fault Tree Analysis |  Engineering Fault Isolation |  Engineering Hypothesis-Driven Troubleshooting |
|---|---|---|---|
Purposedifferent | 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. | 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 systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. |
Complexitydifferent | High | Medium | Medium |
Timedifferent | 2-6 h | 30-180 min | 30-240 min |
Participantsdifferent | 3-8 | 1-6 | 1-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary |
Tagsno overlap | RiskRoot causeSafety | TroubleshootingDiagnosisEngineering | TroubleshootingProblem solvingDiagnosis |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
