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| Criterion |  Engineering Kanban |  Product Discovery Dual-Track Agile |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | When work sits in too many parallel streams, throughput suffers and no one sees the bottlenecks. Kanban makes the flow of work visible and limits overload so a system becomes calmer and more predictable. | When uncertainty and delivery run in parallel, it separates learning work from implementation while keeping both connected. It prevents unvalidated ideas from falling directly into the delivery stream. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | 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 | Medium | Medium | Low | Medium |
Timedifferent | Ongoing | Laufend, Wochen bis Monate | 20-35 min | 1-5 Tage |
Participantsdifferent | 2-12 | 4-10 | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | Kanban board, WIP policies, Flow metrics | Discovery Backlog, Delivery Backlog, Experiment-Ergebnisse, Validierte Stories | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | FlowVisual managementDelivery | AgileDiscoveryDelivery | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |