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| Criterion |  Operations Barrier Analysis |  Decision Making Risk Matrix |  Operations Causal Factor Analysis |  Operations Fault Tree Analysis |
|---|---|---|---|---|
Purposedifferent | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | When a project faces many possible disruptions, it quickly becomes unclear which risks deserve attention first. It separates options, evaluation criteria, and open risks. The result is captured as a Risk Matrix and a Top Risk List. | 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. | 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 | Medium | Low | High | High |
Timedifferent | 2-4 h | 30-60 min | 2-6 h | 2-6 h |
Participantsdifferent | 2-6 | 3-10 | 3-10 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Risk Matrix, Top Risk List | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | Root causeSafetyIncident | RiskDecisionPrioritizationAssessment | CausalityIncidentRoot causeTimeline | RiskRoot causeSafety |