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| Criterion |  Product Discovery Kano Model |  Operations 5 Whys |  Agile Specification by Example |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | When features need to be distinguished by their effect on satisfaction, it makes expectations and surprises comparable. It separates basic needs, performance contribution, and delight. | 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. | When business rules need to become precise, it ties language, example, and test together. It sorts work by value, risk, and delivery ability. The result is captured as an Example Table and Acceptance Tests. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 1-2 Tage | 15-30 min | 60-90 min pro Feature | 1-4 h |
Participantsdifferent | 10-50 | 2-6 | 3-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Kano Matrix, Feature Classes, Priority Themes | Root cause notes, Countermeasures | Example Table, Acceptance Tests | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | SatisfactionPrioritizationCustomer | Root causeIncidentLeanProblem solving | AgileRequirementsExamplesBehavior-Driven Development | Root causeProblem solvingQualityIncident |