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| Criterion |  UX Research Usability Testing |  Innovation Lean Startup |  UX Research Card Sorting |  Innovation Design Sprint |
|---|---|---|---|---|
Purposedifferent | 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. | For uncertain business assumptions, the method forces the idea into contact with real market reactions early. It separates wishful picture, assumption, and observable behavior, so that learning becomes faster than planning. This translates uncertainty into measurable insight. | 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. |
Complexitydifferent | Medium | Medium | Low | High |
Timedifferent | 1-2 h je Session | Wochen bis Monate je Lernzyklus | 20-45 min | 4-5 Tage |
Participantsdifferent | Based on research question | 2-8 | Based on research question | 5-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Usability Issues, Severity List, Recommendations | Hypothesis list, MVPs, Learning reports, Pivot or persevere decision | Content groups, Label set, IA hypotheses | Prototype, Test Findings, Decision Rationale |
Tagsno overlap | ValidationUXPrototype | LeanStartupValidationMVP | Information architectureNavigationStructure | Design sprintPrototypeValidationInnovation |