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| Criterion |  Product Strategy Product Canvas |  Architecture Architecture Decision Record |  Architecture C4 Model |
|---|---|---|---|
Purposedifferent | When product goal and feature scope don't yet fit cleanly together, it creates a shared working picture. It connects need, core features, and assumptions into a solid starting point. | 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. | 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. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 1-2 h | 15-45 min | 1-4 h |
Participantsdifferent | 2-8 | 1-3 | 1-5 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Product Canvas, Product Assumptions, Scope Notes | ADR File, Decision Log, Rationale | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | CanvasDiscoveryScope | ArchitectureRationaleDocumentationGovernance | ArchitectureCommunicationVisualization |
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