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| Criterion |  Innovation Double Diamond |  UX Research Usability Testing |  Product Discovery Problem Interview |  Innovation Design Thinking |
|---|---|---|---|---|
Purposedifferent | For complex problems with a fuzzy situation, the method cleanly separates search space and decision. It first creates breadth in understanding and then focus in elaboration. This brings open questions, problem definition, and solution path into a traceable movement. | 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. | 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. | For complex user problems with an uncertain cause, the method connects observation, interpretation, and experiment into a learning cycle. It keeps the focus on real needs and avoids premature solution language. This produces robust decisions for product and service. |
Complexitydifferent | Medium | Medium | Medium | High |
Timedifferent | Wochen bis Monate | 1-2 h je Session | 30-60 min je Interview | 1 Tag bis mehrere Wochen |
Participantsdifferent | 3-12 | Based on research question | 5-12 Interviews | 4-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Usability Issues, Severity List, Recommendations | Problem Evidence, Risk Notes, Customer Segments | Problem Statement, Prototype, Test Learnings |
Tagsno overlap | ProcessDivergenceInnovation | ValidationUXPrototype | DiscoveryInterviewsValidation | InnovationPrototypeResearch |