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| Criterion |  UX Research Card Sorting |  UX Research User Interviews |  Product Discovery Opportunity Interview |  Product Discovery Opportunity Solution Tree |
|---|---|---|---|---|
Purposedifferent | 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 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 opportunities are still hidden behind signals of need, it structures conversations around needs and obstacles. It looks for patterns that lead to new product opportunities. | When discovery keeps swinging between goals, ideas, and learning loops, it creates clear steering logic. It connects the desired outcome, opportunities, and experiments into a legible structure. |
Complexitydifferent | Low | Low | Medium | Medium |
Timedifferent | 20-45 min | 30–60 min per interview | 30-60 min je Interview | 1-2 h Setup, laufend |
Participantsdifferent | Based on research question | 1 participant per interview | 5-12 Interviews | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Content groups, Label set, IA hypotheses | Interview Notes, Themes, Insight Summary | Interview Notes, Opportunity Themes, Customer Quotes | Opportunity Solution Tree, Experiment Backlog, Learning Log |
Tagsno overlap | Information architectureNavigationStructure | QualitativeResearchCustomerDiscovery | DiscoveryInterviewsOpportunityCustomer | DiscoveryOutcomesExperimentsOpportunity |