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| Criterion |  Architecture Architecture Decision Record |  Operations A3 Problem Solving |  Architecture C4 Model |  Architecture Architecture Communication Canvas |
|---|---|---|---|---|
Purposedifferent | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | The Architecture Communication Canvas plans architecture communication so the right people receive the right message. The method turns technical complexity into deliberate communication design. |
Complexitydifferent | Low | Medium | Low | Medium |
Timedifferent | 15-45 min | 45-90 min | 1-4 h | 60-120 min |
Participantsdifferent | 1-3 | 2-5 | 1-5 | 2-8 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | A3 Report, Action Plan, Root Cause Analysis | Context Diagram, Container Diagram, Component Diagram | Communication Canvas, Stakeholder Messages, Architecture Communication Plan |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | LeanProblem solvingCoachingOperations | ArchitectureCommunicationVisualization | ArchitectureCommunicationStakeholdersCanvas |