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| Criterion |  Operations Gemba Walk |  Operations A3 Problem Solving |  Facilitation Nominal Group Technique |
|---|---|---|---|
Purposedifferent | 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 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 loud voices could dominate a round, Nominal Group Technique protects individual thinking time from group effects. It collects ideas separately first and only then enables shared weighting. |
Complexitydifferent | Low | Medium | Medium |
Timedifferent | 30-120 min | 45-90 min | 60-120 min |
Participantsdifferent | 2-6 | 2-5 | 5-12 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Observation Notes, Improvement Ideas | A3 Report, Action Plan, Root Cause Analysis | Ranked Ideas, Clarified Options, Group Priority |
Tagsno overlap | LeanObservationProcessOperations | LeanProblem solvingCoachingOperations | FacilitationPrioritizationVotingInclusion |
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