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| Criterion |  Product Strategy ICE Scoring |  Operations A3 Problem Solving |  Decision Making Assumption Surfacing |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | 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 | Low | Medium | Low | Low |
Timedifferent | 30-60 min | 45-90 min | 45-90 min | 15-30 min |
Participantsdifferent | 2-8 | 2-5 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | ICE Table, Top Idea List | A3 Report, Action Plan, Root Cause Analysis | Assumption List, Critical Assumptions, Learning Plan | Root cause notes, Countermeasures |
Tagsno overlap | PrioritizationScoringGrowthDecision | LeanProblem solvingCoachingOperations | AssumptionsRiskDecisionDiscovery | Root causeIncidentLeanProblem solving |