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| Criterion |  Product Discovery Fake Door Test |  Product Strategy Counter Metrics |  Engineering Goal Question Metric |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | Helps clarify technical problems, hypotheses, and next steps in concrete terms. It breaks a technical problem into testable parts. The result is captured as a GQM table and metric briefs. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 1-5 Tage | 30-60 min | 90-180 min | 25-40 min |
Participantsdifferent | Nutzertraffic | 2-6 | 3-6 | 1-5 |
Formatdifferent | Async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | Counter Metric List, Guardrail Definitions | GQM Table, Metric Profiles | Learning Card with evidence and next action |
Tagsno overlap | ValidationExperimentsDemandDiscovery | MetricsMeasurementStrategyExperiments | MetricsMeasurementEngineeringAlignment | ExperimentsValidationDiscoveryLearning |