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| Criterion |  Engineering Hypothesis-Driven Troubleshooting |  Innovation Contradiction Analysis |  Operations A3 Problem Solving |  Operations Gemba Walk |
|---|---|---|---|---|
Purposedifferent | When systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | When a system should improve while another measure suffers as a result, the method makes the underlying conflict precisely formulable. It separates the desired effect from its side effect. This makes solutions possible that address the contradiction deliberately instead of half-heartedly. | 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. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 30-240 min | 60-120 min | 45-90 min | 30-120 min |
Participantsdifferent | 1-6 | 2-8 | 2-5 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | Contradiction Statement, Abstraction Notes, Solution Principles, Concept Ideas | A3 Report, Action Plan, Root Cause Analysis | Observation Notes, Improvement Ideas |
Tagsno overlap | TroubleshootingProblem solvingDiagnosis | ContradictionsInnovationProblem solving | LeanProblem solvingCoachingOperations | LeanObservationProcessOperations |