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| Criterion |  Operations RACI Matrix |  Architecture C4 Model |  Decision Making DACI |
|---|---|---|---|
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. | In cross-functional decisions, responsibilities quickly blur between approval, influence, and execution. DACI arranges these roles so decision pressure, contribution, and information stay cleanly separated. |
Complexitysame | Low | Low | Low |
Timedifferent | 45-90 min | 1-4 h | 30-60 min |
Participantsdifferent | 2-8 | 1-5 | 2-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | RACI Matrix, Responsibility Map, Decision Notes | Context Diagram, Container Diagram, Component Diagram | DACI Matrix, Decision Owner, Decision Log |
Tagsno overlap | RolesResponsibilityGovernanceOperations | ArchitectureCommunicationVisualization | DecisionRolesGovernanceAlignment |
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