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| Criterion |  Product Discovery Solution Interview |  UX Research Surveys |  Decision Making Delphi Method |  Innovation Design Thinking |
|---|---|---|---|---|
Purposedifferent | 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. | When a topic needs to be validated broadly and many people can answer the same question, surveys gather structured feedback in a scalable form. Answers become comparable and segmentable instead of remaining merely anecdotal. | When knowledge is distributed and direct dominance should be avoided, groups quickly fall under the sway of their opinion leaders. The Delphi Method gathers assessments iteratively and gradually brings expert judgments closer together. | 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 | High | High |
Timedifferent | 30-60 min je Interview | 3-14 Tage | 1-4 Wochen | 1 Tag bis mehrere Wochen |
Participantsdifferent | 5-10 Interviews | 50+ | 6-30 Experten | 4-10 |
Formatdifferent | Workshop + async | Async | Async | Workshop |
Outputdifferent | Solution Feedback, Objection List, Validation Notes | Survey Results, Charts, Segment Insights | Expert Forecast, Consensus Range, Assumption Notes | Problem Statement, Prototype, Test Learnings |
Tagsno overlap | ValidationInterviewsPrototype | QuantitativeResearchValidation | ForecastingExpertsDecisionStrategy | InnovationPrototypeResearch |