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| Criterion |  Decision Making Pre-Mortem |  Decision Making Decision Tree |  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. | For decisions with follow-on paths and dependencies, a linear comparison is often not enough. A Decision Tree shows how options branch under conditions and which consequences hang on each branch. | 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 | 30-90 min | 30-90 min |
Participantsdifferent | Small cross-functional group | 1-6 | 3-12 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Risk list, Mitigation plan, Assumption log | Decision Tree, Option Map, Assumption List | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | RiskDecisionFailurePlanning | DecisionTreeOptions | Site Reliability EngineeringIncidentLearningReliability |
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