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| Criterion |  Operations A3 Problem Solving |  Facilitation Dot Estimation |  Product Discovery Test Card |  Product Discovery Experiment Canvas |
|---|---|---|---|---|
Purposedifferent | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | 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. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | 45-90 min | 5-20 min | 20-35 min | 30-60 min |
Participantsdifferent | 2-5 | 3-20 | 1-5 | 1-5 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Effort Heatmap, Risk Signals, Discussion Targets | Test Card with a pre-set threshold | Completed Experiment Canvas, Success Metric |
Tagsno overlap | LeanProblem solvingCoachingOperations | EstimationEffortRisk | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryHypothesis |