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Selected:Three-Point EstimationPERT EstimationATAM (Architecture Tradeoff Analysis Method)Dot Estimation
| Criterion |  Decision Making Three-Point Estimation |  Decision Making PERT Estimation |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Facilitation Dot Estimation |
|---|---|---|---|---|
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. | 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. | 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 size or effort can only be estimated roughly, Dot Estimation condenses the group's experience into a quick range. It turns individual contributions into a visible selection. The result is captured as an Effort Heatmap, Risk Signals, and Discussion Targets. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 10-30 min je Item | 15-45 min | Several meetings plus preparation and analysis; total effort depends on scope | 5-20 min |
Participantsdifferent | 1-8 | 1-8 | Evaluation team, architects, and relevant stakeholders | 3-20 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Three-Point Estimate, Risk Range, Assumption Notes | PERT Estimate, Expected Value, Risk Notes | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Effort Heatmap, Risk Signals, Discussion Targets |
Tagsno overlap | EstimationUncertaintyForecasting | EstimationUncertaintyRisk | ArchitectureQualityRiskTradeoffsStakeholders | EstimationEffortRisk |