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| Criterion |  Decision Making Three-Point Estimation |  Decision Making Delphi Method |  Architecture Architecture Decision Record |  Architecture Request for Comments |
|---|---|---|---|---|
Purposedifferent | A single estimate for effort, time, or risk often looks too smooth for the real uncertainty behind it. It separates options, evaluation criteria, and open risks. The result is captured as a Three-Point Estimate, Risk Range, and Assumption 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. | 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. | 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 | Medium | High | Low | Medium |
Timedifferent | 10-30 min je Item | 1-4 Wochen | 15-45 min | 1-3 Wochen vom Draft bis zur Entscheidung |
Participantsdifferent | 1-8 | 6-30 Experten | 1-3 | 3-20 Reviewer |
Formatdifferent | Workshop + async | Async | Async | Async |
Outputdifferent | Three-Point Estimate, Risk Range, Assumption Notes | Expert Forecast, Consensus Range, Assumption Notes | ADR File, Decision Log, Rationale | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets |
Tagsno overlap | EstimationUncertaintyForecasting | ForecastingExpertsDecisionStrategy | ArchitectureRationaleDocumentationGovernance | ArchitectureDecisionAsyncGovernance |