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| Criterion |  DevOps Blameless Postmortem |  DevOps Incident Command |  Delivery Communication Plan |
|---|---|---|---|
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. | 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. | When many people need to be informed in parallel and messages would otherwise arrive unevenly or too late, a Communication Plan orders communication reliably. Channels, audiences, and cadences interlock so important information doesn't get lost. |
Complexitydifferent | Medium | Medium | Low |
Timedifferent | 30-90 min | As needed | 45-90 min |
Participantsdifferent | 3-12 | 4-15 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Incident Log, Action Tracker, Stakeholder Updates | Communication Plan, Channel Matrix, Message Cadence |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | IncidentOperationsReliability | CommunicationStakeholdersDeliveryPlanning |
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