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| Criterion |  UX Research Usability Testing |  Product Discovery Problem Interview |  UX Research User Interviews |  Innovation Design Sprint |
|---|---|---|---|---|
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 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. | 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 the product question is unclear and time pressure is high, the method takes a team from an open idea to a testable solution. It connects problem understanding, decision, and learning in one compact format, lowering the risk of spending a lot of energy on a mere guess. |
Complexitydifferent | Medium | Medium | Low | High |
Timedifferent | 1-2 h je Session | 30-60 min je Interview | 30–60 min per interview | 4-5 Tage |
Participantsdifferent | Based on research question | 5-12 Interviews | 1 participant per interview | 5-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Usability Issues, Severity List, Recommendations | Problem Evidence, Risk Notes, Customer Segments | Interview Notes, Themes, Insight Summary | Prototype, Test Findings, Decision Rationale |
Tagsno overlap | ValidationUXPrototype | DiscoveryInterviewsValidation | QualitativeResearchCustomerDiscovery | Design sprintPrototypeValidationInnovation |