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| Criterion |  Decision Making Wideband Delphi |  Architecture C4 Model |  Architecture Architecture Decision Record |  Architecture arc42 |
|---|---|---|---|---|
Purposedifferent | A single opinion rarely holds up for planning when the future is genuinely uncertain. It separates options, evaluation criteria, and open risks. The result is captured as an Estimate Range, Assumption Log, and Expert Consensus Notes. | 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. | 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. |
Complexitydifferent | High | Low | Low | Low |
Timedifferent | 1-4 h or multiple rounds | 1-4 h | 15-45 min | 1-2 Tage |
Participantsdifferent | 4-12 Experten | 1-5 | 1-3 | 1-4 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Context Diagram, Container Diagram, Component Diagram | ADR File, Decision Log, Rationale | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | EstimationExpertsForecasting | ArchitectureCommunicationVisualization | ArchitectureRationaleDocumentationGovernance | ArchitectureDocumentationCommunication |