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| Criterion |  Product Strategy Lean Canvas |  UX Research Card Sorting |  UX Research Tree Testing |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | When an early product bet still has too many open points, it brings target group, problem, and assumptions into a single view. It condenses the idea so core risks become nameable. | When content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. | When a navigation exists but search paths still fail, tree testing checks findability without visual distraction. The method shows whether labels, levels, and paths really lead to the intended destination. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 45-90 min | 20-45 min | 1-2 Tage | 15-30 min |
Participantsdifferent | 1-6 | Based on research question | Based on research question | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop |
Outputdifferent | Lean Canvas, Core Assumptions, Experiment Backlog | Content groups, Label set, IA hypotheses | Findability Metrics, Path Analysis, Revised IA | Root cause notes, Countermeasures |
Tagsno overlap | StartupLeanAssumptionsBusiness model | Information architectureNavigationStructure | Information architectureNavigationFindability | Root causeIncidentLeanProblem solving |