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| Criterion |  Product Discovery Solution Interview |  Product Strategy Counter Metrics |  Product Discovery MVP Test Matrix |  Product Discovery Fake Door Test |
|---|---|---|---|---|
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 headline metric could mask side effects, it adds guardrail signals against unwanted outcomes. It connects customer value, product logic, and decision priorities. The result is captured as a counter-metric list and guardrail definitions. | 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. | When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 30-60 min je Interview | 30-60 min | 45-75 min | 1-5 Tage |
Participantsdifferent | 5-10 Interviews | 2-6 | 2-8 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Async |
Outputdifferent | Solution Feedback, Objection List, Validation Notes | Counter Metric List, Guardrail Definitions | Test Matrix, Test Plan | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | ValidationInterviewsPrototype | MetricsMeasurementStrategyExperiments | ExperimentsValidationDiscoveryOptions | ValidationExperimentsDemandDiscovery |