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| Criterion |  Operations Barrier Analysis |  Knowledge Modeling Feynman Technique |  DevOps Blameless Postmortem |  Operations 5 Whys |
|---|---|---|---|---|
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. | The Feynman Technique checks understanding by explaining a topic so that it stays easy for others to understand. It makes knowledge gaps visible before they become costly in everyday work. | 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 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. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 2-4 h | 20-60 min | 30-90 min | 15-30 min |
Participantsdifferent | 2-6 | 1 | 3-12 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Plain-language Explanation, Knowledge Gaps, Study Notes | Postmortem Doc, Action Items, Timeline | Root cause notes, Countermeasures |
Tagsno overlap | Root causeSafetyIncident | LearningKnowledgeUnderstanding | Site Reliability EngineeringIncidentLearningReliability | Root causeIncidentLeanProblem solving |