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| Criterion |  Operations Fault Tree Analysis |  Operations ABC Analysis |  Decision Making Assumption Surfacing |  Operations Kepner-Tregoe |
|---|---|---|---|---|
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. | With many similar objects of differing economic significance, the method prioritizes effort by effect. It separates what needs regular steering from what rarely needs attention. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. |
Complexitydifferent | High | Low | Low | High |
Timedifferent | 2-6 h | 30-60 min | 45-90 min | 2-8 h |
Participantsdifferent | 3-8 | 1-5 | 2-8 | 2-8 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | ABC Classification, Focus Rules, Control List | Assumption List, Critical Assumptions, Learning Plan | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | RiskRoot causeSafety | PrioritizationOperationsPortfolio | AssumptionsRiskDecisionDiscovery | Problem solvingRoot causeDecisionOperations |