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| Criterion |  Operations Fault Tree Analysis |  Architecture Views and Beyond |  Operations 5 Whys |  Operations MORT Analysis |
|---|---|---|---|---|
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. | Views and Beyond organizes architecture into several views so no single diagram has to do everything at once. This makes it possible to choose the representation that fits the stakeholder's question. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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. |
Complexitydifferent | High | Medium | Low | High |
Timedifferent | 2-6 h | 1-3 Tage | 15-30 min | Mehrere Tage bis Wochen |
Participantsdifferent | 3-8 | 1-4 | 2-6 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Architecture Views, Cross-view Notes, Rationale | Root cause notes, Countermeasures | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tagsno overlap | RiskRoot causeSafety | DocumentationStakeholdersArchitecture | Root causeIncidentLeanProblem solving | Root causeSafetySystemicIncident |