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| Criterion |  Decision Making Assumption Surfacing |  DevOps Blameless Postmortem |  Operations Failure Mode and Effects Analysis |  DevOps Incident Command |
|---|---|---|---|---|
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. | 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 a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | 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. |
Complexitydifferent | Low | Medium | High | Medium |
Timedifferent | 45-90 min | 30-90 min | 2-6 h | As needed |
Participantsdifferent | 2-8 | 3-12 | 3-10 | 4-15 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Postmortem Doc, Action Items, Timeline | FMEA Table, Risk Priority, Mitigation Actions | Incident Log, Action Tracker, Stakeholder Updates |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | Site Reliability EngineeringIncidentLearningReliability | RiskQualityOperationsRoot cause | IncidentOperationsReliability |