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| Criterion |  DevOps Blameless Postmortem |  Operations 5 Whys |  DevOps Incident Command |
|---|---|---|---|
Purposedifferent | 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 single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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 | Medium | Low | Medium |
Timedifferent | 30-90 min | 15-30 min | As needed |
Participantsdifferent | 3-12 | 2-6 | 4-15 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Root cause notes, Countermeasures | Incident Log, Action Tracker, Stakeholder Updates |
Tags1 shared | Site Reliability EngineeringIncidentLearningReliability | Root causeIncidentLeanProblem solving | IncidentOperationsReliability |
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