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| Criterion |  Operations Change Analysis |  Operations Fault Tree Analysis |  Decision Making PERT Estimation |  Operations MORT 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. | 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. | On complex initiatives, a plain average tends to understate just how uncertain the outcome really is. It separates options, evaluation criteria, and open risks. The result is captured as a PERT Estimate, Expected Value, and Risk Notes. | 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. |
Complexitydifferent | Medium | High | Medium | High |
Timedifferent | 45-120 min | 2-6 h | 15-45 min | Mehrere Tage bis Wochen |
Participantsdifferent | 2-6 | 3-8 | 1-8 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | PERT Estimate, Expected Value, Risk Notes | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | RiskRoot causeSafety | EstimationUncertaintyRisk | Root causeSafetySystemicIncident |