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| Criterion |  Facilitation Open Space Technology |  Architecture C4 Model |  Architecture Architecture Decision Record |
|---|---|---|---|
Purposedifferent | When a complex topic does not yet have a fitting agenda, Open Space Technology hands topic ownership back to the participants. The format suits questions that only move forward when real interest determines the order. | 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. | 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. |
Complexitydifferent | High | Low | Low |
Timedifferent | 0.5-2 Tage | 1-4 h | 15-45 min |
Participantsdifferent | 20-500+ | 1-5 | 1-3 |
Formatdifferent | Workshop | Workshop + async | Async |
Outputdifferent | Session Marketplace, Proceedings, Action Topics | Context Diagram, Container Diagram, Component Diagram | ADR File, Decision Log, Rationale |
Tagsno overlap | FacilitationLarge groupAutonomy | ArchitectureCommunicationVisualization | ArchitectureRationaleDocumentationGovernance |
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