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| Criterion |  Knowledge Modeling Teach-back |  Operations Fault Tree Analysis |  Operations Barrier Analysis |  DevOps Blameless Postmortem |
|---|---|---|---|---|
Purposedifferent | Teach-back checks whether an explanation actually got through to the other person. The method makes misunderstandings visible early and strengthens shared understanding in advisory and learning situations. | 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 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. | 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. |
Complexitydifferent | Low | High | Medium | Medium |
Timedifferent | 5-20 min | 2-6 h | 2-4 h | 30-90 min |
Participantsdifferent | 2-8 | 3-8 | 2-6 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Understanding Check, Clarification Notes, Learning Gaps | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | LearningUnderstandingCommunication | RiskRoot causeSafety | Root causeSafetyIncident | Site Reliability EngineeringIncidentLearningReliability |