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| Criterion |  Operations Gemba Walk |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Product Discovery Assumption Mapping |
|---|---|---|---|
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. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitydifferent | Low | High | Medium |
Timedifferent | 30-120 min | Several meetings plus preparation and analysis; total effort depends on scope | 45-60 min |
Participantsdifferent | 2-6 | Evaluation team, architects, and relevant stakeholders | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Observation Notes, Improvement Ideas | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | LeanObservationProcessOperations | ArchitectureQualityRiskTradeoffsStakeholders | AssumptionsRiskExperimentsValidation |
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