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| Criterion |  Operations Fault Tree Analysis |  Decision Making Constraint Analysis |  Operations Barrier Analysis |  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 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. | 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 | 2-4 h | 20–45 min |
Participantsdifferent | 3-8 | 2-8 | 2-6 | 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 | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Risk list, Mitigation plan, Assumption log |
Tagsno overlap | RiskRoot causeSafety | ConstraintsDecisionPlanningOptions | Root causeSafetyIncident | RiskDecisionFailurePlanning |