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| Criterion |  Product Discovery Problem Interview |  Innovation Design Thinking |  UX Research User Interviews |  Product Discovery Solution Interview |
|---|---|---|---|---|
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. | For complex user problems with an uncertain cause, the method connects observation, interpretation, and experiment into a learning cycle. It keeps the focus on real needs and avoids premature solution language. This produces robust decisions for product and service. | 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 a solution idea is already on the table, it checks how it is understood and evaluated. It looks for resonance, objections, and missing fit early in the conversation. |
Complexitydifferent | Medium | High | Low | Medium |
Timedifferent | 30-60 min je Interview | 1 Tag bis mehrere Wochen | 30–60 min per interview | 30-60 min je Interview |
Participantsdifferent | 5-12 Interviews | 4-10 | 1 participant per interview | 5-10 Interviews |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Problem Statement, Prototype, Test Learnings | Interview Notes, Themes, Insight Summary | Solution Feedback, Objection List, Validation Notes |
Tagsno overlap | DiscoveryInterviewsValidation | InnovationPrototypeResearch | QualitativeResearchCustomerDiscovery | ValidationInterviewsPrototype |