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| Criterion |  Growth Funnel Analysis |  Operations 8D Problem Solving |  Product Discovery Smoke Test |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | When many visitors or users drop off along the way, the reason behind the number often stays hidden. Funnel Analysis exposes these transitions and makes visible exactly where the path collapses. | 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. | When demand only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. | 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 | High | Low | Low |
Timedifferent | 1-3 h | 1-6 Wochen | 1-5 Tage | 15-30 min |
Participantsdifferent | 1-5 | 4-10 | Nutzertraffic | 2-6 |
Formatdifferent | Async | Workshop + async | Async | Workshop |
Outputdifferent | Funnel report, Drop-off analysis, Optimization hypotheses | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Interest Metrics, Conversion Signal, Learning Note | Root cause notes, Countermeasures |
Tagsno overlap | AnalyticsConversionGrowth | QualityProblem solvingRoot cause | ValidationExperimentsDemandGrowth | Root causeIncidentLeanProblem solving |