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| Criterion |  Decision Making Wideband Delphi |  Decision Making Delphi Method |  Architecture arc42 |  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. | 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. | 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. | 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 | High | Low | Low |
Timedifferent | 1-4 h or multiple rounds | 1-4 Wochen | 1-2 Tage | 1-4 h |
Participantsdifferent | 4-12 Experten | 6-30 Experten | 1-4 | 1-5 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Expert Forecast, Consensus Range, Assumption Notes | Architecture Document, Context View, Runtime View, Deployment View | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | EstimationExpertsForecasting | ForecastingExpertsDecisionStrategy | ArchitectureDocumentationCommunication | ArchitectureCommunicationVisualization |