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| Criterion |  Product Strategy Lean Canvas |  Product Discovery Pretotyping |  Operations 8D Problem Solving |  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. | Pretotyping clarifies whether a customer problem and solution idea create enough real demand. It separates problem, assumption, solution, and evidence, and captures the result as a pretotyping sketch, test setup, and conversion data. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | 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 | High | Low |
Timedifferent | 45-90 min | Stunden bis wenige Tage | 1-6 Wochen | 15-30 min |
Participantsdifferent | 1-6 | 1-4 | 4-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Lean Canvas, Core Assumptions, Experiment Backlog | Pretotyping sketch, Test setup, Conversion data, Go or no-go decision | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Root cause notes, Countermeasures |
Tagsno overlap | StartupLeanAssumptionsBusiness model | ValidationDemandMVP | QualityProblem solvingRoot cause | Root causeIncidentLeanProblem solving |