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| Criterion |  Architecture Architecture Decision Record |  DevOps Blameless Postmortem |  DevOps ChatOps |  DevOps Incident Command |
|---|---|---|---|---|
Purposedifferent | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | 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 operational work in a distributed team, the method links communication with direct system control. It records decisions right where the signal, the context, and the execution come together. | 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 | Medium | Medium |
Timedifferent | 15-45 min | 30-90 min | Ongoing | As needed |
Participantsdifferent | 1-3 | 3-12 | 2-20 | 4-15 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Postmortem Doc, Action Items, Timeline | Chat Transcript, Action Log, Automations | Incident Log, Action Tracker, Stakeholder Updates |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | Site Reliability EngineeringIncidentLearningReliability | CollaborationEngineeringIncident | IncidentOperationsReliability |