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| Criterion |  Operations Barrier Analysis |  Agile Specification by Example |  Operations Root Cause Analysis |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | 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. | 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 | Medium | Medium | Low |
Timedifferent | 2-4 h | 60-90 min pro Feature | 1-4 h | 15-30 min |
Participantsdifferent | 2-6 | 3-6 | 3-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Example Table, Acceptance Tests | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Root cause notes, Countermeasures |
Tagsno overlap | Root causeSafetyIncident | AgileRequirementsExamplesBehavior-Driven Development | Root causeProblem solvingQualityIncident | Root causeIncidentLeanProblem solving |