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| Criterion |  Decision Making PERT Estimation |  Agile T-Shirt Sizing |  Agile Ideal Days |
|---|---|---|---|
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. | When effort only needs to be classified roughly, it makes comparability more important than false precision. It helps sort work quickly into manageable sizes. | When effort needs to be thought of as real working time, it offers a simple common denominator for comparison. It sorts work by value, risk, and delivery ability. The result is captured as Ideal Day Estimates, Assumption Notes, and Capacity Caveats. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 15-45 min | 15-45 min | 15-60 min |
Participantsdifferent | 1-8 | 2-12 | 2-9 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | PERT Estimate, Expected Value, Risk Notes | Size Buckets, Rough Backlog Map, Split Candidates | Ideal Day Estimates, Assumption Notes, Capacity Caveats |
Tags1 shared | EstimationUncertaintyRisk | EstimationAgileRoadmap | EstimationEffortAgile |
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