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| Criterion |  Operations Barrier Analysis |  Operations Root Cause Analysis |  Innovation Rapid Ideation |  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 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. | When a decision needs to be prepared quickly, the method generates many solution-close variants in a short time. It deliberately relies on pace to undercut self-censorship and perfectionism. This quickly produces a usable field for prioritization and further work. | 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 | Low | Low |
Timedifferent | 2-4 h | 1-4 h | 5-20 min | 15-30 min |
Participantsdifferent | 2-6 | 3-8 | 1-20 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Ideenpool, Roh-Shortlist, Cluster | Root cause notes, Countermeasures |
Tagsno overlap | Root causeSafetyIncident | Root causeProblem solvingQualityIncident | BrainstormingIdeationDivergenceSpeed | Root causeIncidentLeanProblem solving |