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| Criterion |  Product Discovery Problem Interview |  Product Discovery Test Card |  Domain Modeling EventStorming |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | When the picture of the problem still needs to become solid, it asks about real situations and consequences. It separates genuine suffering from mere interest in a solution. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | When a domain consists of many events, rules, and states, it creates a shared modeling space for the team. It bundles language, flows, and boundaries before domain knowledge fragments into siloed views. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 30-60 min je Interview | 20-35 min | 2-8 h | 25-40 min |
Participantsdifferent | 5-12 Interviews | 1-5 | 5-12 | 1-5 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Test Card with a pre-set threshold | Event Timeline, Ubiquitous Language, Boundaries, Open Questions | Learning Card with evidence and next action |
Tags1 shared | DiscoveryInterviewsValidation | ExperimentsValidationDiscoveryHypothesis | Domain-Driven DesignEventsDiscoveryWorkshop | ExperimentsValidationDiscoveryLearning |