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| Criterion |  UX Research Usability Testing |  UX Research User Interviews |  Product Discovery MVP Test Matrix |  Product Discovery Riskiest Assumption Test |
|---|---|---|---|---|
Purposedifferent | When a product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | 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. | When several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. | When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 1-2 h je Session | 30–60 min per interview | 45-75 min | 1-2 Wochen pro Iteration |
Participantsdifferent | Based on research question | 1 participant per interview | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Usability Issues, Severity List, Recommendations | Interview Notes, Themes, Insight Summary | Test Matrix, Test Plan | Prioritized Assumption List, Test Plan, Results Report |
Tagsno overlap | ValidationUXPrototype | QualitativeResearchCustomerDiscovery | ExperimentsValidationDiscoveryOptions | ExperimentsValidationDiscoveryAssumptions |