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| Criterion |  Architecture Architecture Decision Record |  Operations Change Analysis |  Delivery Communication Plan |
|---|---|---|---|
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. | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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 | Low | Medium | Low |
Timedifferent | 15-45 min | 45-120 min | 45-90 min |
Participantsdifferent | 1-3 | 2-6 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Communication Plan, Channel Matrix, Message Cadence |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | ChangeRoot causeTroubleshootingComparison | CommunicationStakeholdersDeliveryPlanning |
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