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Selected:Three-Point EstimationA3 Problem SolvingATAM (Architecture Tradeoff Analysis Method)PERT Estimation
| Criterion |  Decision Making Three-Point Estimation |  Operations A3 Problem Solving |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Decision Making PERT 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. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | 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 | Medium | High | Medium |
Timedifferent | 10-30 min je Item | 45-90 min | Several meetings plus preparation and analysis; total effort depends on scope | 15-45 min |
Participantsdifferent | 1-8 | 2-5 | Evaluation team, architects, and relevant stakeholders | 1-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Three-Point Estimate, Risk Range, Assumption Notes | A3 Report, Action Plan, Root Cause Analysis | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | PERT Estimate, Expected Value, Risk Notes |
Tagsno overlap | EstimationUncertaintyForecasting | LeanProblem solvingCoachingOperations | ArchitectureQualityRiskTradeoffsStakeholders | EstimationUncertaintyRisk |