1、REAFFIRMED 2011FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgIntentionally left blank AN AMERICAN NA TIONALST ANDARDGUIDELINES FOR DECISION RULES:CONSIDERING MEASUREMENTUNCERTAINTY IN DETERMININGCONFORMANCE TO SPECIFICATIONSASME B89.7.3.1-2001Date of Issuance:March 18,2002This Standard will
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8、uced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2002 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.C
9、ONTENTSForeword.ivCommittee Roster.viCorrespondence With the B89 Committee.viiAbstract.viii1Scope.12Definitions.13Requirements for Decision Rules.23.12Zone Identification.3.22Decision Outcome.3.32Repeated Measurements.3.42Data Rejection.4Acceptance and Rejection Zones in Decision Rules.34.13Simple A
10、cceptance and Rejection Using a N:1 Decision Rule.4.24Stringent Acceptance and Relaxed Rejection Using a Z%Guard Band.4.34Stringent Rejection and Relaxed Acceptance Using a Z%Guard Band.4.45Decision Rules With a Transition Zone.5Examples of Decision Rules.55.15.5.26.5.36.5.46.Figures1An Example of G
11、uard Bands Used for Creating a Binary Decision RuleWith Stringent Acceptance and Relaxed Rejection Zones.323An Example of Simple Acceptance and Rejection Using a 4:1 Ratio.34Stringent Acceptance and Relaxed Rejection Examples.45Symmetric Two-Sided Relaxed Acceptance and Stringent Rejection.5Stringen
12、t Acceptance,Simple Rejection,and a Transition Zone ExampleUsing Symmetric Two-Sided Guard Banding.5Nonmandatory AppendicesA7Application of Decision Rules in the Customer-Supplier Relationship.B8Repeated Measurement.C9Outlier Measurement Results.D10Special Issues of Decision Rules for Instrumentatio
13、n.E12Determination of Guard Band Limits.F13A Discussion of ISO 14253-1.G14References.iiiFOREWORDThe intent of these guidelines is to facilitate the development of understanding betweensuppliers and customers regarding measurement uncertainty in the decision to accept or toreject a product.Metrologis
14、ts are continuously faced with the task of making decisions inthe presence of measurement uncertainty.To formalize this task,procedures known asdecision rules have been developed.A decision rule is a prescription for the acceptanceor rejection of products based on the measurement result of a charact
15、eristic of the product,the permissible variation associated with that characteristic,and the uncertainty of themeasurement result.For workpieces,the permissible variation is commonly called thetolerance;for instruments it is often given by the specification limits or maximum permissibleerror(MPE).Th
16、e terminology of ISO 14253-1 has been adopted and the permitted variationof a products characteristic is referred to as the specification zone.This document isintended to provide guidance on decision rules and their implementation.A related document,ASME B89.7.2-1999,Dimensional Measurement Planning,specifiesrequirements for preparation and approval of dimensional measurement plans and for theuse of approved plans in making dimensional measurements.The dimensional measurementplan must contain or