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| Criterion |  Product Strategy DIBB |  UX Research User Interviews |  Product Discovery Test Card |  Product Discovery Assumption Mapping |
|---|---|---|---|---|
Purposedifferent | DIBB helps clarify target groups, value, goals, and priorities by making the logic behind a decision explicit. It captures results as a DIBB document, belief list, bet list, and learning report. | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitydifferent | Low | Low | Low | Medium |
Timedifferent | 1-2 h | 30–60 min per interview | 20-35 min | 45-60 min |
Participantsdifferent | 2-8 | 1 participant per interview | 1-5 | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | DIBB document, Belief list, Bet list, Learning report | Interview Notes, Themes, Insight Summary | Test Card with a pre-set threshold | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | StrategyDecisionAssumptionsHypothesis | QualitativeResearchCustomerDiscovery | ExperimentsValidationDiscoveryHypothesis | AssumptionsRiskExperimentsValidation |