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Geometrical product specifications (GPS). Inspection by measurement of workpieces and measuring equipment - Decision rules for verifying conformity or nonconformity with specifications Ingestion-build-82396 Who is BS EN 6501 Scope This document establishes the rules for verifying the conformity or nonconformity with a given tolerance for a characteristic of a workpiece (or a population of workpieces) or with a given maximum permissible errors for a metrological characteristic of a measuring equipment, including when the measured value falls close to the specification limits, taking measurement uncertainty into account. This document applies to specifications defined in