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| Criterion |  Engineering Goal Question Metric |  Product Discovery MVP Test Matrix |  Product Discovery Test Card |  Product Strategy Counter Metrics |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | 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. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 90-180 min | 45-75 min | 20-35 min | 30-60 min |
Participantsdifferent | 3-6 | 2-8 | 1-5 | 2-6 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | GQM Table, Metric Profiles | Test Matrix, Test Plan | Test Card with a pre-set threshold | Counter Metric List, Guardrail Definitions |
Tagsno overlap | MetricsMeasurementEngineeringAlignment | ExperimentsValidationDiscoveryOptions | ExperimentsValidationDiscoveryHypothesis | MetricsMeasurementStrategyExperiments |