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| Criterion |  Operations RACI Matrix |  Architecture C4 Model |  Delivery Communication Plan |
|---|---|---|---|
Purposedifferent | With unclear responsibilities across several roles or areas, the method creates unambiguous accountability logic. It reduces friction because decision, execution, contribution, and information become separately visible. | 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. | 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. |
Complexitysame | Low | Low | Low |
Timedifferent | 45-90 min | 1-4 h | 45-90 min |
Participantsdifferent | 2-8 | 1-5 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | RACI Matrix, Responsibility Map, Decision Notes | Context Diagram, Container Diagram, Component Diagram | Communication Plan, Channel Matrix, Message Cadence |
Tagsno overlap | RolesResponsibilityGovernanceOperations | ArchitectureCommunicationVisualization | CommunicationStakeholdersDeliveryPlanning |
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