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| Criterion |  Decision Making Pre-Mortem |  DevOps Blameless Postmortem |  DevOps Game Day |
|---|---|---|---|
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 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. | In preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic. |
Complexitydifferent | Low | Medium | High |
Timedifferent | 20–45 min | 30-90 min | Halber Tag |
Participantsdifferent | Small cross-functional group | 3-12 | 5-20 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Risk list, Mitigation plan, Assumption log | Postmortem Doc, Action Items, Timeline | Simulation Notes, Gaps List, Updated Runbooks |
Tagsno overlap | RiskDecisionFailurePlanning | Site Reliability EngineeringIncidentLearningReliability | ResilienceOperationsIncident |
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