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| Criterion |  UX Research User Interviews |  UX Research Card Sorting |  Product Discovery Opportunity Solution Tree |
|---|---|---|---|
Purposedifferent | 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 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 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 |
Timedifferent | 30–60 min per interview | 20-45 min | 1-2 h Setup, laufend |
Participantsdifferent | 1 participant per interview | Based on research question | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Content groups, Label set, IA hypotheses | Opportunity Solution Tree, Experiment Backlog, Learning Log |
Tagsno overlap | QualitativeResearchCustomerDiscovery | Information architectureNavigationStructure | DiscoveryOutcomesExperimentsOpportunity |
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