ASME B89.7.3.1:2001 pdf download CUIDELINES FOR DECISION RULES: CONSIDERING MEASUREMENT UNCERTAINTY IN DETERMINING CONFORRIIANtE TO SPECIFICATIONS
1 SCOPE
These guidelines provide terminology and specifythe content that must be addressed when stating adecision rule used for deciding the acceptance or rejec-tion of a product according to specification.
2 DEFINITIONS
decision rule: a documented rule, meeting the requirements of section 3 of these guidelines, that describeshow measurement uncertainty will be allocated withregard to accepting or rejecting a product according toits specification and the result of a measurement.
binary decision rule: a decision rule with only twopossible outcomes,either acceptance or rejection.
specification zone (of an instrument or workpiece): theset of values of a characteristic between, and includingthe specification limits.2, 3, 4
measurand: particular quantity subject to measure-ment. See VIM，2.6.5
expanded uncertainty: quantity defining an intervalabout the result of a measurement that may be expectedto encompass a large fraction of the distribution ofvalues that could reasonably be attributed to the measur-and.See GUM、2.3.5.
uncertainty interval (of a measurement): the set ofvalues of a characteristic about the result of a measure-ment that may be expected to encompass a large fractionof the distribution of values that could reasonably beattributed to the measurand.6, 7
N:I decision rule: a situation where the width of thespecification zone is at least N times larger than theuncertainty interval for the measurement result.8
acceptance zone: the set of values of a characteristicfor a specified measurement process and decision rule.that results in product acceptance when a measurementresult 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 measurement10result 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 rejectionzone.11
guard band: the magnitude of the offset from thespecification limit to the acceptance or rejection zoneboundary.12, 13,14,15, 16, 17
simple acceptance:the situation when the acceptancezone equals and is identical to the specification zone.
simple rejection: the situation when the rejection zoneconsists of all values of the characteristic outside thespecification zone.
stringent acceptance: the situation when the accept-ance zone is reduced from the specification zone bya guard band(s). See Fig. 1. 18, 15
relaxed rejection: the situation when the rejectionzone is partially inside the specification zone by theamount of a guard band. See Fig. 1.18
relaxed acceptance:the situation when the acceptancezone is increased beyond the specification zone by aguard band.20
ASME B89.7.3.1:2001 pdf download
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