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| Criterion |  Operations Fault Tree Analysis |  Operations Root Cause Tree 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. |
Complexitydifferent | High | Medium |
Timedifferent | 2-6 h | 1-3 h |
Participantsdifferent | 3-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Cause Tree, Evidence Notes, Countermeasures |
Tags1 shared | RiskRoot causeSafety | Root causeTreeIncidentQuality |
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