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| Criterion |  Decision Making Assumption Surfacing |  Operations Barrier Analysis |  Operations Root Cause Tree Analysis |  Operations Fault Tree Analysis |
|---|---|---|---|---|
Purposedifferent | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | 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. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | 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 | Low | Medium | Medium | High |
Timedifferent | 45-90 min | 2-4 h | 1-3 h | 2-6 h |
Participantsdifferent | 2-8 | 2-6 | 2-8 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Cause Tree, Evidence Notes, Countermeasures | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | Root causeSafetyIncident | Root causeTreeIncidentQuality | RiskRoot causeSafety |