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| Criterion |  Facilitation Lean Coffee |  Architecture Architecture Decision Record |  Architecture C4 Model |
|---|---|---|---|
Purposedifferent | When a group without a fixed agenda needs to get into useful conversations quickly, Lean Coffee structures the start around interests rather than a presentation. The group itself negotiates which topics get time first and which wait. | 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. |
Complexitysame | Low | Low | Low |
Timedifferent | 30-90 min | 15-45 min | 1-4 h |
Participantsdifferent | 3-20 | 1-3 | 1-5 |
Formatdifferent | Workshop | Async | Workshop + async |
Outputdifferent | Prioritized Topics, Discussion Notes, Action Items | ADR File, Decision Log, Rationale | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | FacilitationAutonomyDialogue | ArchitectureRationaleDocumentationGovernance | ArchitectureCommunicationVisualization |
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