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| Criterion |  Decision Making Assumption Surfacing |  DevOps Incident Command |  Decision Making Pre-Mortem |  DevOps Blameless Postmortem |
|---|---|---|---|---|
Purposedifferent | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | During an acute incident with several people involved, the method creates a clear leadership and communication structure. It reduces chaos when fast coordination and clean situational awareness are both needed at once. | 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. |
Complexitydifferent | Low | Medium | Low | Medium |
Timedifferent | 45-90 min | As needed | 20–45 min | 30-90 min |
Participantsdifferent | 2-8 | 4-15 | Small cross-functional group | 3-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Incident Log, Action Tracker, Stakeholder Updates | Risk list, Mitigation plan, Assumption log | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | IncidentOperationsReliability | RiskDecisionFailurePlanning | Site Reliability EngineeringIncidentLearningReliability |