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| Criterion |  Decision Making Assumption Surfacing |  Operations MORT Analysis |  Operations 5 Whys |  Operations Fault Tree Analysis |
|---|---|---|---|---|
Purposedifferent | 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 safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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 | Low | High | Low | High |
Timedifferent | 45-90 min | Mehrere Tage bis Wochen | 15-30 min | 2-6 h |
Participantsdifferent | 2-8 | 2-6 | 2-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Root cause notes, Countermeasures | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | Root causeSafetySystemicIncident | Root causeIncidentLeanProblem solving | RiskRoot causeSafety |