ASME B89.7.3.1 pdf download

ASME B89.7.3.1 pdf download CUIDELINES FOR DECISION RULES: CONSIDERING MEASUREMENT UNCERTAINTY IN DETERMINING CONFORRIIANtE TO SPECIFICATIONS
1 SCOPE
These guidelines provide terminology and specify the content that must be addressed when stating a decision rule used for deciding the acceptance or rejec- tion of a product according to specification.
2 DEFINITIONS decision rule: a documented rule, meeting the require- ments of section 3 of these guidelines, that describes how measurement uncertainty will be allocated with regard to accepting or rejecting a product according to its specification and the result of a measurement. binary decision rule: possible outcomes, either acceptance or rejection.
specification zone (of an instrument or workpiece): the set of values of a characteristic between, and including, the specification limits.2* 39 a decision rule with only two measurand: particular quantity subject to measurement. See VIM. 2.6 expanded uncertainiy: quantity defining an interval about the result of a measurement that may be expected to encompass a large fraction of the distribution of values that could reasonably be attributed to the measur- and. See GUM, 2.3.5
uncertainty interval (of a measurement): the set of values of a characteristic about the result of a measure- ment that may be expected to encompass a large fraction of the distribution of values that could reasonably be attributed to the measurand.69 ’ N:l decision rule: a situation where the width of the specification zone is at least N times larger than the uncertainty interval for the measurement result.
acceptance zone: the set of values of a characteristic, for a specified measurement process and decision rule, that results in product acceptance when a measurement result is within this zone.
rejection zone: the set of values of a characteristic, for a specified measurement process and decision rule, that results in product rejection when a measurement result is within this zone.” transition zone: the set of values of a characteristic, for a specified measurement process and decision rule, that is neither in the acceptance zone nor rejection zone.’