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| Criterion |  Engineering Failure Scenario Analysis |  Operations Fault Tree Analysis |  Operations Causal Factor Analysis |
|---|---|---|---|
Purposedifferent | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. | 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 an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. |
Complexitydifferent | Medium | High | High |
Timedifferent | 1-3 h | 2-6 h | 2-6 h |
Participantsdifferent | 3-8 | 3-8 | 3-10 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions |
Tagsno overlap | FailureResilienceRisk | RiskRoot causeSafety | CausalityIncidentRoot causeTimeline |
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