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| Criterion |  Product Discovery Problem Interview |  Operations Root Cause Analysis |  Operations Kepner-Tregoe |  Operations Fishbone Diagram |
|---|---|---|---|---|
Purposedifferent | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 30-60 min je Interview | 1-4 h | 2-8 h | 30-60 min |
Participantsdifferent | 5-12 Interviews | 3-8 | 2-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Problem Evidence, Risk Notes, Customer Segments | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Problem Analysis, Decision Analysis, Risk Plan | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | DiscoveryInterviewsValidation | Root causeProblem solvingQualityIncident | Problem solvingRoot causeDecisionOperations | Root causeQualityOperations |