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| Criterion |  Operations Fault Tree Analysis |  Operations MORT Analysis |  Decision Making Pre-Mortem |  Decision Making Assumption Surfacing |
|---|---|---|---|---|
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. | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. | 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. |
Complexitydifferent | High | High | Low | Low |
Timedifferent | 2-6 h | Mehrere Tage bis Wochen | 20–45 min | 45-90 min |
Participantsdifferent | 3-8 | 2-6 | Small cross-functional group | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Risk list, Mitigation plan, Assumption log | Assumption List, Critical Assumptions, Learning Plan |
Tagsno overlap | RiskRoot causeSafety | Root causeSafetySystemicIncident | RiskDecisionFailurePlanning | AssumptionsRiskDecisionDiscovery |