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| Criterion |  Architecture C4 Model |  Product Discovery Problem Interview |  Product Discovery Learning Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. | When the picture of the problem still needs to become solid, it asks about real situations and consequences. It separates genuine suffering from mere interest in a solution. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | 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 | Low | Medium |
Timedifferent | 1-4 h | 30-60 min je Interview | 25-40 min | 1-5 Tage |
Participantsdifferent | 1-5 | 5-12 Interviews | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Context Diagram, Container Diagram, Component Diagram | Problem Evidence, Risk Notes, Customer Segments | Learning Card with evidence and next action | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | ArchitectureCommunicationVisualization | DiscoveryInterviewsValidation | ExperimentsValidationDiscoveryLearning | ValidationExperimentsDemandDiscovery |