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| Criterion |  Decision Making Wideband Delphi |  Architecture Architecture Decision Record |  Architecture C4 Model |  Decision Making Delphi Method |
|---|---|---|---|---|
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. | 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. | When knowledge is distributed and direct dominance should be avoided, groups quickly fall under the sway of their opinion leaders. The Delphi Method gathers assessments iteratively and gradually brings expert judgments closer together. |
Complexitydifferent | High | Low | Low | High |
Timedifferent | 1-4 h or multiple rounds | 15-45 min | 1-4 h | 1-4 Wochen |
Participantsdifferent | 4-12 Experten | 1-3 | 1-5 | 6-30 Experten |
Formatdifferent | Workshop + async | Async | Workshop + async | Async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | ADR File, Decision Log, Rationale | Context Diagram, Container Diagram, Component Diagram | Expert Forecast, Consensus Range, Assumption Notes |
Tagsno overlap | EstimationExpertsForecasting | ArchitectureRationaleDocumentationGovernance | ArchitectureCommunicationVisualization | ForecastingExpertsDecisionStrategy |