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| Criterion |  Decision Making Pre-Mortem |  Operations Learning Review |  DevOps Blameless Postmortem |
|---|---|---|---|
Purposedifferent | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and 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. | 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 | Medium | Medium |
Timedifferent | 20–45 min | 1-3 h | 30-90 min |
Participantsdifferent | Small cross-functional group | 3-10 | 3-12 |
Formatdifferent | Workshop | Workshop | Workshop + async |
Outputdifferent | Risk list, Mitigation plan, Assumption log | Learning Review Notes, System Factors, Improvement Actions | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | RiskDecisionFailurePlanning | LearningRetrospectiveIncidentOperations | Site Reliability EngineeringIncidentLearningReliability |
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