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| Criterion |  Decision Making Delphi Method |  UX Research User Interviews |  Product Discovery Learning Card |  Product Discovery MVP Test Matrix |
|---|---|---|---|---|
Purposedifferent | 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. | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | When several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. |
Complexitydifferent | High | Low | Low | Medium |
Timedifferent | 1-4 Wochen | 30–60 min per interview | 25-40 min | 45-75 min |
Participantsdifferent | 6-30 Experten | 1 participant per interview | 1-5 | 2-8 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Interview Notes, Themes, Insight Summary | Learning Card with evidence and next action | Test Matrix, Test Plan |
Tagsno overlap | ForecastingExpertsDecisionStrategy | QualitativeResearchCustomerDiscovery | ExperimentsValidationDiscoveryLearning | ExperimentsValidationDiscoveryOptions |