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| Criterion |  Engineering Failure Scenario Analysis |  Operations A3 Problem Solving |  Operations Gemba Walk |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | 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 | 1-3 h | 45-90 min | 30-120 min | 15-30 min |
Participantsdifferent | 3-8 | 2-5 | 2-6 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop | Workshop |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | A3 Report, Action Plan, Root Cause Analysis | Observation Notes, Improvement Ideas | Root cause notes, Countermeasures |
Tagsno overlap | FailureResilienceRisk | LeanProblem solvingCoachingOperations | LeanObservationProcessOperations | Root causeIncidentLeanProblem solving |