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| Criterion |  Agile Bucket System |  Agile Affinity Estimation |  Systems Thinking Future Reality Tree |
|---|---|---|---|
Purposedifferent | When a large batch of work needs a fast, rough estimate, it sorts items into predefined size buckets. It sorts work by value, risk, and delivery ability. The result is captured as a Bucketed Backlog, Relative Estimates, and Split Candidates. | 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 | 30-90 min | 30-90 min | 2-4 h |
Participantsdifferent | 3-12 | 3-12 | 3-8 |
Formatsame | Workshop | Workshop | Workshop |
Outputdifferent | Bucketed Backlog, Relative Estimates, Split Candidates | Affinity Size Map, Grouped Estimates, Unclear Items | Future Reality Tree, Negative Branches, Assumption List, Improved Injections |
Tagsno overlap | EstimationBacklogRelative sizing | EstimationBacklogRelative sizing | Theory of ConstraintsSystems thinkingChange |
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