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| Criterion |  Operations Root Cause Tree Analysis |  DevOps Blameless Postmortem |  Operations Learning Review |
|---|---|---|---|
Purposedifferent | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | 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. | After a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. |
Complexitysame | Medium | Medium | Medium |
Timedifferent | 1-3 h | 30-90 min | 1-3 h |
Participantsdifferent | 2-8 | 3-12 | 3-10 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Cause Tree, Evidence Notes, Countermeasures | Postmortem Doc, Action Items, Timeline | Learning Review Notes, System Factors, Improvement Actions |
Tags1 shared | Root causeTreeIncidentQuality | Site Reliability EngineeringIncidentLearningReliability | LearningRetrospectiveIncidentOperations |
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