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| Criterion |  Architecture Architecture Decision Record |  DevOps Blameless Postmortem |  Architecture Architecture Communication Canvas |
|---|---|---|---|
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. | The Architecture Communication Canvas plans architecture communication so the right people receive the right message. The method turns technical complexity into deliberate communication design. |
Complexitydifferent | Low | Medium | Medium |
Timedifferent | 15-45 min | 30-90 min | 60-120 min |
Participantsdifferent | 1-3 | 3-12 | 2-8 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Postmortem Doc, Action Items, Timeline | Communication Canvas, Stakeholder Messages, Architecture Communication Plan |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | Site Reliability EngineeringIncidentLearningReliability | ArchitectureCommunicationStakeholdersCanvas |
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