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| Criterion |  UX Research Diary Study |  Product Discovery MVP Test Matrix |  Product Discovery Problem Interview |  Product Discovery Riskiest Assumption Test |
|---|---|---|---|---|
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 several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. | 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 an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 1-4 Wochen | 45-75 min | 30-60 min je Interview | 1-2 Wochen pro Iteration |
Participantsdifferent | 5-20 | 2-8 | 5-12 Interviews | 2-6 |
Formatdifferent | Async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Test Matrix, Test Plan | Problem Evidence, Risk Notes, Customer Segments | Prioritized Assumption List, Test Plan, Results Report |
Tagsno overlap | UX researchTrackingBehavior | ExperimentsValidationDiscoveryOptions | DiscoveryInterviewsValidation | ExperimentsValidationDiscoveryAssumptions |