正版 ISO 22514-6- Word格式.docx

1、Partie 6: Statistiques de capability pour un processus caracterise par une distribution normale multivarieeReference numberISO 22514-6:2013（E）COPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in a

2、ny form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postal

3、e 56 CH-1211 Geneva 20Tel.+ 41 22 749 01 11Fax+ 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandContentsPageForewordivIntroductionv1Scope12Normative references13Terms and definitions14Abbreviated terms35Process analysis46Use of multivariate process capability and perform

4、ance assessment47Calculation of process capability and process performance47.1Description of Types I and II47.2Designation and symbols of the indices57.3Types Ic and lie process capability index87.4Types Ila and Type lib process capability index108Examples118.1Two-dimensional position tolerances118.

5、2Position and dimension of a slot16Annex A （informative） Derivation of formulae20Annex B （informative） Shaft imbalance example 25Annex C （informative） Hole position example29Annex D （informative） Construction of the quality function33Bibliography34ForewordISO （the International Organization for Stan

6、dardization） 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 the right

7、 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.International St

8、andards 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. Publication as an In

9、ternational Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 22514-

10、6 was prepared by Technical Committee ISO/TC 69, Applications of statistical methods, Subcommittee SC 4, Applications of statistical methods in process management.ISO 22514 consists of the following parts, under the general title Statistical methods in process management Capability and performance:P

11、art 1: General principles and conceptsPart 2: Process capability and performance of time-dependent process modelsPart 3: Machine performance studies for measured data on discrete partsPart 4: Process capability estimates and performance measures Technical ReportPart 5: Process capability statistics

12、for attribute characteristicsPart 6: Process capability statistics for characteristics following a multivariate normal distributionPart 7: Capability of measurement processesPart 8: Machine performance of a multi-state production processIntroductionDue to the increased complexity of the production m

13、ethods and the increasing quality requirements for products and processes, a process analysis based on univariate quantities is in many cases not sufficient.Instead, it may be necessary to analyse the process on the basis of multivariate product quantities. This can, for instance, be in such cases w

14、here geometric tolerances, dynamic magnitudes such as imbalance, correlated quantities of materials or other procedural products are observed.By analogy with ISO 22514-2, ISO 22514-6 provides calculation formulae for process performance and process capability indices, which take into consideration process dispersion as well as process location as an extension to the corresponding indices for univariate quantities. The indices proposed are indeed based on the classical Cp and Cpk indices for the one-dimensional ca