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| Criterion |  Operations Gemba Walk |  Product Strategy ICE Scoring |  Decision Making Decision Matrix |  Operations A3 Problem Solving |
|---|---|---|---|---|
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. | When ideas need sorting quickly, it condenses impact, confidence, and effort into one compact score. It connects customer value, product logic, and decision priorities. The result is captured as an ICE table and top-ideas list. | When several options collide with several criteria, comparison quickly becomes subjective. A Decision Matrix makes the trade-off visible and brings weighting, criteria, and options into a shared logic. | 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. |
Complexitydifferent | Low | Low | Medium | Medium |
Timedifferent | 30-120 min | 30-60 min | 45-90 min | 45-90 min |
Participantsdifferent | 2-6 | 2-8 | 2-8 | 2-5 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Observation Notes, Improvement Ideas | ICE Table, Top Idea List | Decision Matrix, Scoring Rationale, Selected Option | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | LeanObservationProcessOperations | PrioritizationScoringGrowthDecision | DecisionCriteriaScoringTradeoffs | LeanProblem solvingCoachingOperations |