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| Criterion |  Decision Making Wideband Delphi |  Architecture arc42 |  Architecture Architecture Decision Record |  Architecture C4 Model |
|---|---|---|---|---|
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. | 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. | 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 | High | Low | Low | Low |
Timedifferent | 1-4 h or multiple rounds | 1-2 Tage | 15-45 min | 1-4 h |
Participantsdifferent | 4-12 Experten | 1-4 | 1-3 | 1-5 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop + async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Architecture Document, Context View, Runtime View, Deployment View | ADR File, Decision Log, Rationale | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | EstimationExpertsForecasting | ArchitectureDocumentationCommunication | ArchitectureRationaleDocumentationGovernance | ArchitectureCommunicationVisualization |