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Selected:NoEstimatesATAM (Architecture Tradeoff Analysis Method)Three-Point EstimationPERT Estimation
| Criterion |  Agile NoEstimates |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Decision Making Three-Point Estimation |  Decision Making PERT Estimation |
|---|---|---|---|---|
Purposedifferent | When estimating slows a team down more than it helps, it shifts the focus to flow, small slices, and real lead time. It sorts work by value, risk, and delivery ability. The result is captured as Throughput Data, Flow Forecast, and Slicing Rules. | 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. | 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. | 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. |
Complexitydifferent | Medium | High | Medium | Medium |
Timedifferent | laufend | Several meetings plus preparation and analysis; total effort depends on scope | 10-30 min je Item | 15-45 min |
Participantsdifferent | 2-12 | Evaluation team, architects, and relevant stakeholders | 1-8 | 1-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Throughput Data, Flow Forecast, Slicing Rules | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Three-Point Estimate, Risk Range, Assumption Notes | PERT Estimate, Expected Value, Risk Notes |
Tagsno overlap | EstimationForecastingFlow | ArchitectureQualityRiskTradeoffsStakeholders | EstimationUncertaintyForecasting | EstimationUncertaintyRisk |