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| Criterion |  UX Research Diary Study |  Product Discovery Opportunity Interview |  Decision Making Assumption Surfacing |  Product Discovery Opportunity Solution Tree |
|---|---|---|---|---|
Purposedifferent | When experiences build up over days or weeks and a single session cannot capture them, Diary Study records the course of everyday life. Recurring triggers, moods, and habits become visible this way, beyond the sharpness of memory. | 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. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | 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 | Medium | Medium | Low | Medium |
Timedifferent | 1-4 Wochen | 30-60 min je Interview | 45-90 min | 1-2 h Setup, laufend |
Participantsdifferent | 5-20 | 5-12 Interviews | 2-8 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Interview Notes, Opportunity Themes, Customer Quotes | Assumption List, Critical Assumptions, Learning Plan | Opportunity Solution Tree, Experiment Backlog, Learning Log |
Tagsno overlap | UX researchTrackingBehavior | DiscoveryInterviewsOpportunityCustomer | AssumptionsRiskDecisionDiscovery | DiscoveryOutcomesExperimentsOpportunity |