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| Criterion |  Operations Root Cause Analysis |  Operations Barrier Analysis |  Innovation Crazy 8s |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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 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. | With only a few minutes available and a still-fuzzy solution search, the method forces a wide range of variants. It produces fast sketches before the first idea can settle in, making different directions directly comparable and open to further development. | 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 | 1-4 h | 2-4 h | 8-15 min | 15-30 min |
Participantsdifferent | 3-8 | 2-6 | 1-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Sketch Set, Idea Shortlist, Direction Options | Root cause notes, Countermeasures |
Tagsno overlap | Root causeProblem solvingQualityIncident | Root causeSafetyIncident | BrainstormingSketchingSpeedDivergenceDesign sprint | Root causeIncidentLeanProblem solving |