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| Criterion |  Operations Barrier Analysis |  Operations MORT Analysis |  DevOps Blameless Postmortem |  Operations Fault Tree Analysis |
|---|---|---|---|---|
Purposedifferent | 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 safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | 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 | Medium | High | Medium | High |
Timedifferent | 2-4 h | Mehrere Tage bis Wochen | 30-90 min | 2-6 h |
Participantsdifferent | 2-6 | 2-6 | 3-12 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Postmortem Doc, Action Items, Timeline | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | Root causeSafetyIncident | Root causeSafetySystemicIncident | Site Reliability EngineeringIncidentLearningReliability | RiskRoot causeSafety |