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| Criterion |  Decision Making Pre-Mortem |  DevOps Blameless Postmortem |  DevOps Incident Timeline Analysis |  Engineering Failure Scenario Analysis |
|---|---|---|---|---|
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. | For an incident with an unclear sequence, the method makes the timeline precisely visible. It separates perception, reaction, and delay so cause and effect become more clearly readable. | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. |
Complexitydifferent | Low | Medium | Medium | Medium |
Timedifferent | 20–45 min | 30-90 min | 60-180 min | 1-3 h |
Participantsdifferent | Small cross-functional group | 3-12 | 3-10 | 3-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Risk list, Mitigation plan, Assumption log | Postmortem Doc, Action Items, Timeline | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions |
Tagsno overlap | RiskDecisionFailurePlanning | Site Reliability EngineeringIncidentLearningReliability | IncidentTimelineSite Reliability Engineering | FailureResilienceRisk |