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| Criterion |  Decision Making PERT Estimation |  Agile Affinity Estimation |  Systems Thinking Future Reality Tree |
|---|---|---|---|
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 many tasks need to be classified quickly, it sorts them by perceived effort and similarity. It reduces the effort of fine-grained estimation for large volumes. | A Future Reality Tree shows how desired actions are meant to lead to a better system state. The method checks whether a path of change holds together logically before time flows into implementation. |
Complexitydifferent | Medium | Medium | High |
Timedifferent | 15-45 min | 30-90 min | 2-4 h |
Participantsdifferent | 1-8 | 3-12 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop |
Outputdifferent | PERT Estimate, Expected Value, Risk Notes | Affinity Size Map, Grouped Estimates, Unclear Items | Future Reality Tree, Negative Branches, Assumption List, Improved Injections |
Tagsno overlap | EstimationUncertaintyRisk | EstimationBacklogRelative sizing | Theory of ConstraintsSystems thinkingChange |
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