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| Criterion |  Decision Making PERT Estimation |  Operations Root Cause Analysis |  Operations Fault Tree Analysis |
|---|---|---|---|
Purposedifferent | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | 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 | Medium | High |
Timedifferent | 15-45 min | 1-4 h | 2-6 h |
Participantsdifferent | 1-8 | 3-8 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | PERT Estimate, Expected Value, Risk Notes | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | EstimationUncertaintyRisk | Root causeProblem solvingQualityIncident | RiskRoot causeSafety |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
