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| Criterion |  Architecture C4 Model |  Delivery Communication Plan |  DevOps Incident Command |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|---|---|
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. | During an acute incident with several people involved, the method creates a clear leadership and communication structure. It reduces chaos when fast coordination and clean situational awareness are both needed at once. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. |
Complexitydifferent | Low | Low | Medium | High |
Timedifferent | 1-4 h | 45-90 min | As needed | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 1-5 | 2-6 | 4-15 | Evaluation team, architects, and relevant stakeholders |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Context Diagram, Container Diagram, Component Diagram | Communication Plan, Channel Matrix, Message Cadence | Incident Log, Action Tracker, Stakeholder Updates | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations |
Tagsno overlap | ArchitectureCommunicationVisualization | CommunicationStakeholdersDeliveryPlanning | IncidentOperationsReliability | ArchitectureQualityRiskTradeoffsStakeholders |