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| Criterion |  DevOps Blameless Postmortem |  Knowledge Modeling Feynman Technique |  Operations Causal Factor Analysis |  Systems Thinking Current Reality Tree |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. |
Complexitydifferent | Medium | Low | High | High |
Timedifferent | 30-90 min | 20-60 min | 2-6 h | 2-6 h |
Participantsdifferent | 3-12 | 1 | 3-10 | 3-8 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Plain-language Explanation, Knowledge Gaps, Study Notes | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Current Reality Tree, Core Problems, Intervention Ideas |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | LearningKnowledgeUnderstanding | CausalityIncidentRoot causeTimeline | Systems thinkingRoot causeConstraintsCausality |