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| Criterion |  Facilitation Lean Coffee |  Architecture arc42 |  Decision Making DACI |  Architecture Request for Comments |
|---|---|---|---|---|
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. | arc42 structures architecture knowledge so teams can document system, decisions, and risks consistently. The template builds a living understanding of the architecture instead of scattered notes. | In cross-functional decisions, responsibilities quickly blur between approval, influence, and execution. DACI arranges these roles so decision pressure, contribution, and information stay cleanly separated. | An RFC clarifies architecture context, options, and consequences. It structures technical context, alternatives, tradeoffs, open questions, and review feedback, and captures the result as an RFC document, reviewer comments, and a decision rationale. |
Complexitydifferent | Low | Low | Low | Medium |
Timedifferent | 30-90 min | 1-2 Tage | 30-60 min | 1-3 Wochen vom Draft bis zur Entscheidung |
Participantsdifferent | 3-20 | 1-4 | 2-10 | 3-20 Reviewer |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Async |
Outputdifferent | Prioritized Topics, Discussion Notes, Action Items | Architecture Document, Context View, Runtime View, Deployment View | DACI Matrix, Decision Owner, Decision Log | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets |
Tagsno overlap | FacilitationAutonomyDialogue | ArchitectureDocumentationCommunication | DecisionRolesGovernanceAlignment | ArchitectureDecisionAsyncGovernance |