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| Criterion |  UX Research Diary Study |  UX Research Usability Testing |  Decision Making Assumption Surfacing |  Innovation Design Sprint |
|---|---|---|---|---|
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 a product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | 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 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. |
Complexitydifferent | Medium | Medium | Low | High |
Timedifferent | 1-4 Wochen | 1-2 h je Session | 45-90 min | 4-5 Tage |
Participantsdifferent | 5-20 | Based on research question | 2-8 | 5-8 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Usability Issues, Severity List, Recommendations | Assumption List, Critical Assumptions, Learning Plan | Prototype, Test Findings, Decision Rationale |
Tagsno overlap | UX researchTrackingBehavior | ValidationUXPrototype | AssumptionsRiskDecisionDiscovery | Design sprintPrototypeValidationInnovation |