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| Criterion |  Facilitation Dot Estimation |  Product Discovery Experiment Canvas |  Agile Bucket System |  Product Discovery Test Card |
|---|---|---|---|---|
Purposedifferent | When size or effort can only be estimated roughly, Dot Estimation condenses the group's experience into a quick range. It turns individual contributions into a visible selection. The result is captured as an Effort Heatmap, Risk Signals, and Discussion Targets. | When experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric. | 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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 5-20 min | 30-60 min | 30-90 min | 20-35 min |
Participantsdifferent | 3-20 | 1-5 | 3-12 | 1-5 |
Formatdifferent | Workshop | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Effort Heatmap, Risk Signals, Discussion Targets | Completed Experiment Canvas, Success Metric | Bucketed Backlog, Relative Estimates, Split Candidates | Test Card with a pre-set threshold |
Tagsno overlap | EstimationEffortRisk | ExperimentsValidationDiscoveryHypothesis | EstimationBacklogRelative sizing | ExperimentsValidationDiscoveryHypothesis |