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| Criterion |  Operations Change Analysis |  Decision Making Assumption Surfacing |  Operations Fault Tree Analysis |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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 critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Medium | Low | High | High |
Timedifferent | 45-120 min | 45-90 min | 2-6 h | 2-6 h |
Participantsdifferent | 2-6 | 2-8 | 3-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Assumption List, Critical Assumptions, Learning Plan | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | AssumptionsRiskDecisionDiscovery | RiskRoot causeSafety | RiskQualityOperationsRoot cause |