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| Criterion |  UX Research Diary Study |  UX Research Card Sorting |  Innovation Design Sprint |  Product Discovery Solution Interview |
|---|---|---|---|---|
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 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 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. | When a solution idea is already on the table, it checks how it is understood and evaluated. It looks for resonance, objections, and missing fit early in the conversation. |
Complexitydifferent | Medium | Low | High | Medium |
Timedifferent | 1-4 Wochen | 20-45 min | 4-5 Tage | 30-60 min je Interview |
Participantsdifferent | 5-20 | Based on research question | 5-8 | 5-10 Interviews |
Formatdifferent | Async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Content groups, Label set, IA hypotheses | Prototype, Test Findings, Decision Rationale | Solution Feedback, Objection List, Validation Notes |
Tagsno overlap | UX researchTrackingBehavior | Information architectureNavigationStructure | Design sprintPrototypeValidationInnovation | ValidationInterviewsPrototype |