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| Criterion |  Product Discovery Problem Interview |  Innovation Design Sprint |  UX Research Card Sorting |  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. | 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. | When content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. | 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 | 4-5 Tage | 20-45 min | 30-60 min je Interview |
Participantsdifferent | 5-12 Interviews | 5-8 | Based on research question | 5-10 Interviews |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Prototype, Test Findings, Decision Rationale | Content groups, Label set, IA hypotheses | Solution Feedback, Objection List, Validation Notes |
Tagsno overlap | DiscoveryInterviewsValidation | Design sprintPrototypeValidationInnovation | Information architectureNavigationStructure | ValidationInterviewsPrototype |