CEN ISO TS 14253-4-2010 Geometrical product specifications (GPS) - Inspection by measurement of workpieces and measuring equipment - Part 4 Background on functional limits and spec.pdf

1、DD CEN ISO/TS14253-4:2010ICS 17.040.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWDRAFT FOR DEVELOPMENTGeometrical productspecifications (GPS) Inspection bymeasurement ofworkpieces andmeasuring equipmentPart 4: Background on functionallimits and specification limits indecis

2、ion rules (ISO/TS 14253-4:2010)Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-This Draft for Development was published under the authority of the Standards Policy and Strategy C

3、ommittee on 30 June 2010 BSI 2010ISBN 978 0 580 66899 9Amendments/corrigenda issued since publicationDate CommentsDD CEN ISO/TS 14253-4:2010National forewordThis Draft for Development is the UK implementation of CEN ISO/TS 14253-4:2010.This publication is not to be regarded as a British Standard.It

4、is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained.Comments arising from the use of this Draft for Development are requeste

5、d so that UK experience can be reported to the international organization responsible for its conversion to an international standard. A review of this publication will be initiated not later than 3 years after its publication by the international organization so that a decision can be taken on its

6、status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards.According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into an international Sta

7、ndard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted to Technical Committ

8、ee TDW/4, Technical Product Realization.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a Briti

9、sh Standard cannot confer immunity from legal obligations.Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION

10、CEN ISO/TS 14253-4 May 2010 ICS 17.040.01 English Version Geometrical product specifications (GPS) - Inspection by measurement of workpieces and measuring equipment - Part 4: Background on functional limits and specification limits in decision rules (ISO/TS 14253-4:2010) Spcification gomtrique des p

11、roduits (GPS) - Vrification par la mesure des pices et des quipements de mesure - Partie 4: Informations de base sur les limites fonctionnelles et les limites de spcification dans les rgles de dcision (ISO/TS 14253-4:2010) Geometrische Produktspezifikationen (GPS) - Prfung von Werkstcken und Messger

12、ten durch Messen - Teil 4: Grundlagen fr Funktionsgrenzen und Spezifikationsgrenzen in Entscheidungsregeln (ISO/TS 14253-4:2010) This Technical Specification (CEN/TS) was approved by CEN on 4 April 2010 for provisional application. The period of validity of this CEN/TS is limited initially to three

13、years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS avail

14、able promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria,

15、Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN

16、COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN ISO/TS 14253-4:2010: ECopyright

17、European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DD CEN ISO/TS 14253-4:2010CEN ISO/TS 14253-4:2010 (E) 3 Foreword This document (CEN ISO/TS 14253-4:2010) has been prepared by Technical Comm

18、ittee ISO/TC 213 “Dimensional and geometrical product specifications and verification“ in collaboration with Technical Committee CEN/TC 290 “Dimensional and geometrical product specification and verification” the secretariat of which is held by AFNOR. Attention is drawn to the possibility that some

19、of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announ

20、ce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,

21、 Switzerland and the United Kingdom. Endorsement notice The text of ISO/TS 14253-4:2010 has been approved by CEN as a CEN ISO/TS 14253-4:2010 without any modification. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking p

22、ermitted without license from IHS-,-,-DD CEN ISO/TS 14253-4:2010ISO/TS 14253-4:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Definitions 1 4 Relationship between functional limits and specification limits2 4.1 General .2 4.2 The o

23、ne-sided case .2 4.3 The two-sided case .6 5 How functional limits are determined .9 5.1 Ideal situation 9 5.2 Use of earlier models 9 5.3 Reverse engineering .9 5.4 Trial and error 10 5.5 Method based on a set of working examples.10 6 Specification limits and how specification limits are determined

24、 relative to functional limits .10 6.1 General .10 6.2 Ideal situation 10 6.3 Specification reduced by assumed measurement uncertainty 10 6.4 Specification reduced by an arbitrary amount.11 7 Shape of assumed functional deterioration curve.11 7.1 Ideal situation 11 7.2 Gradual deterioration11 8 Dete

25、rmining specification limits 12 8.1 Ideal situation 12 8.2 Batch parts made by desired process 12 9 Alternative basis for decision rules.12 9.1 General .12 9.2 Alternative decision rules.12 9.3 Choice of alternative decision rules13 Annex A (informative) Relation to the GPS matrix model.14 Bibliogra

26、phy16 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DD CEN ISO/TS 14253-4:2010ISO/TS 14253-4:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization

27、 for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has

28、the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Intern

29、ational Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publicati

30、on as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of document: an ISO Publicly Available S

31、pecification (ISO/PAS) represents an agreement between technical experts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the memb

32、ers of a technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Stand

33、ard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. Attention is drawn to the possibility that some of the elements of this document may be the subject

34、of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TS 14253-4 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product specifications and verification. ISO 14253 consists of the following parts, under the general title Ge

35、ometrical product specifications (GPS) Inspection by measurement of workpieces and measuring equipment: Part 1: Decision rules for proving conformance or non-conformance with specifications Part 2: Guidance for the estimation of uncertainty in GPS measurement, in calibration of measuring equipment a

36、nd in product verification Part 3: Guidelines for achieving agreements on measurement uncertainty statements Part 4: Background on functional limits and specification limits in decision rules Technical Specification Copyright European Committee for Standardization Provided by IHS under license with

37、CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DD CEN ISO/TS 14253-4:2010ISO/TS 14253-4:2010(E) ISO 2010 All rights reserved vIntroduction This part of ISO 14253 is a geometrical product specifications (GPS) standard and is to be regarded as a global GPS standa

38、rd (see ISO/TR 14638). It influences the chain links 3, 4, 5 and 6 of all chains of general GPS standards. For more detailed information on the relation of this part of ISO 14253 to other standards and the GPS matrix model, see Annex A. The decision rules given in ISO 14253-1, which apply unless oth

39、erwise specified, are designed to ensure that workpieces and measuring equipment are within the specification and that disputes over whether workpieces and measuring equipment are within the specification can be avoided. In order for the decision rules to work as designed, it is important to first g

40、ive proof of conformance. In other words, the user/buyer of the product in question should always require the manufacturer/supplier/seller of the product to provide proof of conformance with the product. If subsequent incoming inspection proves nonconformance, uncertainty budgets can be examined acc

41、ording to ISO 14253-3 for mutual assurance of their validity. If it is concluded that both uncertainty budgets are valid, the only conclusion is that one or the other or both measurement results are unrepresentative for the measurement process in question. If, for some reason, the user of the produc

42、t does not want the supplier to provide the first proof, but instead relies on incoming inspection, the user should reduce the functional limits by the measurement uncertainty of the incoming inspection to arrive at the contractual specification limits that are communicated to, and negotiated and ag

43、reed with, the supplier. A separate problem is that of the reseller, who purchases product from a manufacturer and resells it to the user. The decision rules given in ISO 14253-1 will function correctly if the reseller requires the manufacturer of the product to provide proof of conformance and subs

44、equently provides that proof to the user. If the reseller for some reason decides to prove conformance to the user independently, there will be cases where neither conformance nor nonconformance can be proven, so the reseller can neither return nor resell the product based on the original specificat

45、ion. Consequently, this approach is not recommended. The decision rules in ISO 14253-1 are also based on a number of assumptions. When these assumptions are not true, these decision rules may not be economically optimal. This part of ISO 14253 outlines these assumptions and discusses why they are th

46、e theoretically ideal assumptions. For workpieces, only the creator of the specification (the designer) can be expected to know whether the assumptions are true. Therefore, any deviations from the ISO 14253-1 decision rules can only be initiated and documented by the specification owner. For measuri

47、ng equipment, a specification may be based on a standard, written unilaterally by the manufacturer or purchaser of the equipment or written in cooperation between the manufacturer and the purchaser of the equipment. If the specification is based on an ISO standard, and the standard does not indicate

48、 other decision rules, the rules of ISO 14253-1 apply. In other cases, the decision rules can only be documented by the specification author(s). It must be recognized that the decision rules, whether they are given implicitly or explicitly, are part of the specification. It must further be recognize

49、d that the issues involved in choosing the optimal set of decision rules are complicated and that it is unrealistic to expect that simple rules can suit every circumstance. Parties should ensure access to competent technical resources before deviating from the ISO 14253-1 decision rules. Copyright European Committee for Standardization Provided by IHS under license