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| Criterion |  Decision Making PERT Estimation |  Decision Making Wideband Delphi |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Decision Making Delphi Method |
|---|---|---|---|---|
Purposedifferent | On complex initiatives, a plain average tends to understate just how uncertain the outcome really is. It separates options, evaluation criteria, and open risks. The result is captured as a PERT Estimate, Expected Value, and Risk Notes. | 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. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. | 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 | Medium | High | High | High |
Timedifferent | 15-45 min | 1-4 h or multiple rounds | Several meetings plus preparation and analysis; total effort depends on scope | 1-4 Wochen |
Participantsdifferent | 1-8 | 4-12 Experten | Evaluation team, architects, and relevant stakeholders | 6-30 Experten |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | PERT Estimate, Expected Value, Risk Notes | Estimate Range, Assumption Log, Expert Consensus Notes | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Expert Forecast, Consensus Range, Assumption Notes |
Tagsno overlap | EstimationUncertaintyRisk | EstimationExpertsForecasting | ArchitectureQualityRiskTradeoffsStakeholders | ForecastingExpertsDecisionStrategy |