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| Criterion |  Architecture C4 Model |  Delivery Communication Plan |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|
Purposedifferent | 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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Low | Low | High |
Timedifferent | 1-4 h | 45-90 min | 2-6 h |
Participantsdifferent | 1-5 | 2-6 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Context Diagram, Container Diagram, Component Diagram | Communication Plan, Channel Matrix, Message Cadence | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | ArchitectureCommunicationVisualization | CommunicationStakeholdersDeliveryPlanning | RiskQualityOperationsRoot cause |
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