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| Criterion |  Operations Fault Tree Analysis |  Decision Making Constraint Analysis |  Decision Making Decision Tree |  Decision Making Pre-Mortem |
|---|---|---|---|---|
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. | When an initiative stalls, the limit often lies not in the idea but in hard or soft boundary conditions. Constraint Analysis separates these limits and shows which of them can actually be shaped. | For decisions with follow-on paths and dependencies, a linear comparison is often not enough. A Decision Tree shows how options branch under conditions and which consequences hang on each branch. | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. |
Complexitydifferent | High | Low | Medium | Low |
Timedifferent | 2-6 h | 30-90 min | 30-90 min | 20–45 min |
Participantsdifferent | 3-8 | 2-8 | 1-6 | Small cross-functional group |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Constraint List, Hard/Soft Classification, Option Impact Notes, Decision Boundaries | Decision Tree, Option Map, Assumption List | Risk list, Mitigation plan, Assumption log |
Tagsno overlap | RiskRoot causeSafety | ConstraintsDecisionPlanningOptions | DecisionTreeOptions | RiskDecisionFailurePlanning |