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| Criterion |  Product Discovery Fake Door Test |  Product Discovery Smoke Test |  Architecture LASR (Lightweight Approach for Software Reviews) |  Growth A/B Testing |
|---|---|---|---|---|
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 demand only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. | LASR helps development teams identify where their software falls short of important quality goals and which improvements to consider. A small group with existing system knowledge can make an initial assessment and investigate open questions in more detail. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 1-5 Tage | 1-5 Tage | 3–4 h for initial assessment; preparation and deeper analysis additional | 1-4 Wochen |
Participantsdifferent | Nutzertraffic | Nutzertraffic | 1 or a small team; particularly suitable for 3–4 people | 1-6 |
Formatdifferent | Async | Async | Workshop + async | Async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | Interest Metrics, Conversion Signal, Learning Note | Lean Mission Statement describing the software’s purpose, Prioritized quality goals and evaluation criteria, Risks and estimated gaps against quality goals, More closely examined findings and open checks | Experiment results, Decision log, Learning summary |
Tagsno overlap | ValidationExperimentsDemandDiscovery | ValidationExperimentsDemandGrowth | ArchitectureQualityRiskAssessmentLean | ExperimentsGrowthAnalyticsValidation |