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| Criterion |  Operations Gemba Walk |  Agile Ideal Days |  Decision Making PERT Estimation |
|---|---|---|---|
Purposedifferent | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | 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. | 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 | Low | Low | Medium |
Timedifferent | 30-120 min | 15-60 min | 15-45 min |
Participantsdifferent | 2-6 | 2-9 | 1-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Observation Notes, Improvement Ideas | Ideal Day Estimates, Assumption Notes, Capacity Caveats | PERT Estimate, Expected Value, Risk Notes |
Tagsno overlap | LeanObservationProcessOperations | EstimationEffortAgile | EstimationUncertaintyRisk |
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