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| Criterion |  Delivery Communication Plan |  DevOps Blameless Postmortem |  Architecture Architecture Decision Record |  Architecture arc42 |
|---|---|---|---|---|
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. | 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. | arc42 structures architecture knowledge so teams can document system, decisions, and risks consistently. The template builds a living understanding of the architecture instead of scattered notes. |
Complexitydifferent | Low | Medium | Low | Low |
Timedifferent | 45-90 min | 30-90 min | 15-45 min | 1-2 Tage |
Participantsdifferent | 2-6 | 3-12 | 1-3 | 1-4 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Communication Plan, Channel Matrix, Message Cadence | Postmortem Doc, Action Items, Timeline | ADR File, Decision Log, Rationale | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | CommunicationStakeholdersDeliveryPlanning | Site Reliability EngineeringIncidentLearningReliability | ArchitectureRationaleDocumentationGovernance | ArchitectureDocumentationCommunication |