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| Criterion |  Product Discovery Test Card |  Agile 4Ls Retrospective |  Product Discovery Experiment Canvas |  Agile Mad Sad Glad |
|---|---|---|---|---|
Purposedifferent | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. | 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 team's or workshop's mood needs to become readable, it structures emotional signals with little setup. It makes strain, relief, and sources of energy tangible. |
Complexitysame | Low | Low | Low | Low |
Timedifferent | 20-35 min | 45–75 min | 30-60 min | 30-60 min |
Participantsdifferent | 1-5 | Team members involved | 1-5 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Test Card with a pre-set threshold | 4Ls Board, Learning Themes, Improvement Actions | Completed Experiment Canvas, Success Metric | Emotion Board, Themes, Action Items |
Tagsno overlap | ExperimentsValidationDiscoveryHypothesis | RetrospectiveLearningReflectionTeam | ExperimentsValidationDiscoveryHypothesis | RetrospectiveTeamReflection |