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| Criterion |  Delivery Communication Plan |  Architecture C4 Model |  Operations Change 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. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. | 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. |
Complexitydifferent | Low | Low | Medium |
Timedifferent | 45-90 min | 1-4 h | 45-120 min |
Participantsdifferent | 2-6 | 1-5 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Communication Plan, Channel Matrix, Message Cadence | Context Diagram, Container Diagram, Component Diagram | Change Matrix, Cause Hypotheses, Validation Questions, Action List |
Tagsno overlap | CommunicationStakeholdersDeliveryPlanning | ArchitectureCommunicationVisualization | ChangeRoot causeTroubleshootingComparison |
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