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| Criterion |  Delivery Communication Plan |  DevOps Blameless Postmortem |  Operations Root Cause Tree Analysis |
|---|---|---|---|
Purposedifferent | 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. | 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 problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | Low | Medium | Medium |
Timedifferent | 45-90 min | 30-90 min | 1-3 h |
Participantsdifferent | 2-6 | 3-12 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Communication Plan, Channel Matrix, Message Cadence | Postmortem Doc, Action Items, Timeline | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | CommunicationStakeholdersDeliveryPlanning | Site Reliability EngineeringIncidentLearningReliability | Root causeTreeIncidentQuality |
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