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| Criterion |  Operations Fault Tree Analysis |  Decision Making Assumption Surfacing |  Product Discovery Test Card |
|---|---|---|---|
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. | 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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | High | Low | Low |
Timedifferent | 2-6 h | 45-90 min | 20-35 min |
Participantsdifferent | 3-8 | 2-8 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Assumption List, Critical Assumptions, Learning Plan | Test Card with a pre-set threshold |
Tagsno overlap | RiskRoot causeSafety | AssumptionsRiskDecisionDiscovery | ExperimentsValidationDiscoveryHypothesis |
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