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| Criterion |  Operations Fishbone Diagram |  Operations Fault Tree Analysis |  Decision Making PERT Estimation |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | 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 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 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. |
Complexitydifferent | Low | High | Medium | Medium |
Timedifferent | 30-60 min | 2-6 h | 15-45 min | 2-4 h |
Participantsdifferent | 2-8 | 3-8 | 1-8 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fishbone Diagram, Cause Categories, Investigation Backlog | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | PERT Estimate, Expected Value, Risk Notes | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | Root causeQualityOperations | RiskRoot causeSafety | EstimationUncertaintyRisk | Root causeSafetyIncident |