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| Criterion |  Operations Fault Tree Analysis |  Operations Root Cause Tree Analysis |  Operations Fishbone Diagram |  Operations MORT Analysis |
|---|---|---|---|---|
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 problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | 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 | High | Medium | Low | High |
Timedifferent | 2-6 h | 1-3 h | 30-60 min | Mehrere Tage bis Wochen |
Participantsdifferent | 3-8 | 2-8 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Cause Tree, Evidence Notes, Countermeasures | Fishbone Diagram, Cause Categories, Investigation Backlog | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tags1 shared | RiskRoot causeSafety | Root causeTreeIncidentQuality | Root causeQualityOperations | Root causeSafetySystemicIncident |