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| Criterion |  Operations Fault Tree Analysis |  UX Design Lean UX Canvas |  Operations MORT Analysis |  Decision Making Assumption Surfacing |
|---|---|---|---|---|
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. | The Lean UX Canvas helps clarify user behavior, touchpoints, and concept decisions. It makes assumptions and desired outcomes visible and captures the result as a completed canvas, hypothesis list, and first experiment. | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | 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. |
Complexitydifferent | High | Medium | High | Low |
Timedifferent | 2-6 h | 2-3 h | Mehrere Tage bis Wochen | 45-90 min |
Participantsdifferent | 3-8 | 3-8 | 2-6 | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Completed Lean UX Canvas, Hypothesis list, First experiment | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Assumption List, Critical Assumptions, Learning Plan |
Tagsno overlap | RiskRoot causeSafety | CanvasHypothesisOutcomesDiscovery | Root causeSafetySystemicIncident | AssumptionsRiskDecisionDiscovery |