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| Criterion |  Agile T-Shirt Sizing |  Agile Affinity Estimation |  Agile Specification by Example |  Agile Bucket System |
|---|---|---|---|---|
Purposedifferent | 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 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. | When business rules need to become precise, it ties language, example, and test together. It sorts work by value, risk, and delivery ability. The result is captured as an Example Table and Acceptance Tests. | 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. |
Complexitydifferent | Low | Medium | Medium | Medium |
Timedifferent | 15-45 min | 30-90 min | 60-90 min pro Feature | 30-90 min |
Participantsdifferent | 2-12 | 3-12 | 3-6 | 3-12 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop |
Outputdifferent | Size Buckets, Rough Backlog Map, Split Candidates | Affinity Size Map, Grouped Estimates, Unclear Items | Example Table, Acceptance Tests | Bucketed Backlog, Relative Estimates, Split Candidates |
Tagsno overlap | EstimationAgileRoadmap | EstimationBacklogRelative sizing | AgileRequirementsExamplesBehavior-Driven Development | EstimationBacklogRelative sizing |