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| Criterion |  Architecture Architecture Decision Record |  Product Discovery Opportunity Interview |  Product Strategy GIST Planning |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | When opportunities are still hidden behind signals of need, it structures conversations around needs and obstacles. It looks for patterns that lead to new product opportunities. | GIST Planning helps clarify target groups, value, goals, and priorities. It links customer value, product logic, and decision priorities, and captures the result as goals, an idea bank, and a step-project list. | 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 | Low | Medium | Medium | Medium |
Timedifferent | 15-45 min | 30-60 min je Interview | Wochen bis Monate je Goal | 1-5 Tage |
Participantsdifferent | 1-3 | 5-12 Interviews | 3-10 | Nutzertraffic |
Formatdifferent | Async | Workshop + async | Workshop + async | Async |
Outputdifferent | ADR File, Decision Log, Rationale | Interview Notes, Opportunity Themes, Customer Quotes | Goals, Idea bank, Step-project list, Tasks, Learning reports | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | DiscoveryInterviewsOpportunityCustomer | RoadmapOutcomesPlanningExperiments | ValidationExperimentsDemandDiscovery |