ASQ-Z1.4-2008.pdf

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1、ANSI/ASQ Z1.4-2008 AMERICAN SOCIETY FOR QUALITY 600 NORTH PLANKINTON AVENUE MILWAUKEE, WISCONSIN 53203 AMERICAN NATIONAL STANDARD SAMPLING PROCEDURES AND TABLES FOR INSPECTION BY ATTRIBUTES AMERICAN NATIONAL STANDARD Sampling Procedures and Tables for Inspection by Attributes Prepared by The Statist

2、ics Subcommittee of the Accredited Standards Committee Z1 on Quality, Environment, Dependability and Statistics Secretariat American Society for Quality ANSI/ASQ Z1.4-2008 Abstract Sampling Procedures and Tables for Inspection by Attributes is an acceptance sampling system to be used with switching

3、rules on a continuing stream of lots for AQL specifi ed. It provides tightened, normal, and reduced plans to be applied for attributes inspection for percent nonconforming or nonconformities per 100 units. AMERICAN NATIONAL STANDARD: An American national Standard implies a consensus of those substan

4、tially con- cerned with its scope and provisions. An American National Standard is intended as a guide to aid the manufacturer, the consumer, and the general public. The existence of an American National Standard does not in any respect preclude any- one, whether he has approved the standard or not,

5、 from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standard. American National Standards are subject to periodic review and users are cautioned to obtain the latest editions. CAUTION NOTICE: This American National Standard may be revised or

6、withdrawn at any time. The procedures of the American National Standards Institute require that action be taken to reaffi rm, revise, or withdraw this standard no later than fi ve years from the date of publication. Purchasers of American National Standards may receive current information on all sta

7、ndards by calling or writing the American National Standards Institute. Published by AMERICAN SOCIETY FOR QUALITY 600 NORTH PLANKINTON MILWAUKEE, WISCONSIN 53203 2008 by the AMERICAN SOCIETY FOR QUALITY No part of this publication may be reproduced in any form, in an electronic retrieval system or o

8、therwise, without the prior written permission of the publisher. Printed in the United States of America Foreword iii (This foreword is not a part of the American National StandardSampling Procedures and Tables for Inspection by Attributes, Z1.4-2008) This standard is a reaffi rmation of ANSI/ASQC Z

9、1.4-2003, “Sampling Procedures and Tables for Inspection by Attributes.” Suggestions for improvement of this standard are welcomed. Send your comments to the sponsor, ASQ Standards, 600 North Plankinton Avenue, Milwaukee, WI 53203. (This page intentionally left blank) Table of Contents ParagraphPage

10、 1.SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.DEFINITIONS AND TERMINOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3.PERCEN

11、T NONCONFORMING AND NONCONFORMITIES PER HUNDRED UNITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.ACCEPTANCE QUALITY LIMIT (AQL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12、 . . . . . . . 2 5.SUBMISSION OF PRODUCT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.ACCEPTANCE AND NON-ACCEPTANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.DRAWING OF SAMPLE

13、S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 8.NORMAL, TIGHTENED, AND REDUCED INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 9.SAMPLING PLANS. . . . . . . . . . . . . . . . . . . . . . . . .

14、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 10.DETERMINATION OF ACCEPTABILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 11.SUPPLEMENTARY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15、. . . . . . . . . . . . . . . . . . . . 6 Tables Table ISample Size Code Letters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table II-ASingle Sampling Plans for Normal Inspection (Master Table) . . . . . . . . . . . . . .

16、 . . . . . . . . . . . . . . . . . . 11 Table II-BSingle Sampling Plans for Tightened Inspection (Master Table) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table II-CSingle Sampling Plans for Reduced Inspection (Master Table) . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17、 . . . 13 Table III-ADoubling Sampling Plans for Normal Inspection (Master Table). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table III-BDoubling Sampling Plans for Tightened Inspection (Master Table). . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table III-CDoubling Sam

18、pling Plans for Reduced Inspection (Master Table) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table IV-AMultiple Sampling Plans for Normal Inspection (Master Table). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table IV-BMultiple Sampling Plans for Tightened Inspec

19、tion (Master Table) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table IV-CMultiple Sampling Plans for Reduced Inspection (Master Table). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table V-AFactors for Determining Approximate Values for Average Outgoing Quality Limits

20、 for Normal Inspection (Single Sampling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table V-BFactors for Determining Approximate Values for Average Outgoing Quality Limits for Tightened Inspection (Single Sampling). . . . . .

21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Table VI-ALimiting Quality (in percent nonconforming) for Which Pa= 10 Percent (for Normal Inspection, Single Sampling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22、 . . . . . . . . . . . 25 Table VI-BLimiting Quality (in nonconformities per hundred units) for Which Pa= 10 Percent (for Normal Inspection, Single Sampling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Table VII-ALimiting Quality (in percent nonc

23、onforming) for Which Pa= 5 Percent (for Normal Inspection, Single Sampling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Table VII-BLimiting Quality (in nonconformities per hundred units) for Which Pa= 5 Percent (for Normal Inspection, Single Samp

24、ling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Table VIIILimit Numbers for Reduced Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table IXAverage Sample Size Curves for Double a

25、nd Multiple Sampling Plans (normal and tightened inspection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table X-ASample Size Code Letter AIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26、 . . . . . 31 Table X-BSample Size Code Letter BIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table X-CSample Size Code Letter CIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 AN

27、SI/ASQ Z1.4-2008 v vi Table X-DSample Size Code Letter DIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Table X-ESample Size Code Letter EIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28、 . 39 Table X-FSample Size Code Letter FIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Table X-GSample Size Code Letter GIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Table X-HS

29、ample Size Code Letter HIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Table X-JSample Size Code Letter JIndividual Plans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Table X-KSample Size Code

30、 Letter KIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Table X-LSample Size Code Letter LIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Table X-MSample Size Code Letter MIndivid

31、ual Plans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Table X-NSample Size Code Letter NIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Table X-PSample Size Code Letter PIndividual Plans . . . .

32、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Table X-QSample Size Code Letter QIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Table X-RSample Size Code Letter RIndividual Plans . . . . . . . . . . . .

33、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Table X-SSample Size Code Letter SIndividual Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Table XIAverage Outgoing Quality Limit Factors for ANSI-Z1.4 Scheme Performance (Single Sa

34、mpling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 Table XIILimiting Quality for ANSI-Z1.4 Scheme Performance for Which Pa= 10 Percent (Single Sampling). . . . . . . . . . . . . . . . . . . . . . . . . . . .

35、 . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Table XIIILimiting Quality for ANSI-Z1.4 Scheme Performance for Which Pa= 5 Percent (Single Sampling). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Table XIVAverage Sample Size T

36、ables for ANSI-Z1.4 Scheme Performance (Single Sampling) . . . . . . . . . . . . . 67 Table XV-ASample Size Code Letter AScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 Table XV-BSample Size Code Letter BScheme Performance . . . . . . . . . . . .

37、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 Table XV-CSample Size Code Letter CScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 Table XV-DSample Size Code Letter DScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . .

38、 . . . . . . . . . . . . . . . 74 Table XV-ESample Size Code Letter EScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Table XV-FSample Size Code Letter FScheme Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

39、. . . 76 Table XV-GSample Size Code Letter GScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 Table XV-HSample Size Code Letter HScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 Table XV-JSample

40、Size Code Letter JScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Table XV-KSample Size Code Letter KScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Table XV-LSample Size Code Letter LScheme

41、 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Table XV-MSample Size Code Letter MScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Table XV-NSample Size Code Letter NScheme Performance . . . . . . .

42、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 Table XV-PSample Size Code Letter PScheme Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 Table XV-QSample Size Code Letter QScheme Performance . . . . . . . . . . . . . . . . . . .

43、. . . . . . . . . . . . . . . . . . . . . 85 Table XV-RSample Size Code Letter RScheme Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 INDEX OF TERMS WITH SPECIAL MEANINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

44、. . . . . . . . . . . . 87 ANSI/ASQ Z1.4-2008 1.SCOPE 1.1PURPOSE. This publication establishes sampling plans and procedures for inspection by attributes. When specifi ed by the responsible authority, this publication shall be referenced in the specifi cation, contract, inspection instructions, or o

45、ther documents and the provisions set forth herein shall govern. The “responsible authority” shall be designated in one of the above documents, as agreed to by the purchaser and seller or producer and user. 1.2APPLICATION. Sampling plans designated in this publication are applicable, but not limited

46、, to inspection of the following: a.End items. b.Components and raw materials. c.Operations. d.Materials in process. e.Supplies in storage. f.Maintenance operations. g.Data or records. h.Administrative procedures. These plans are intended primarily to be used for a continu- ing series of lots or bat

47、ches. The plans may also be used for the inspection of isolated lots or batches, but, in this latter case, the user is cautioned to consult the operating charac- teristic curves to fi nd a plan which will yield the desired pro- tection (see 11.6). 1.3INSPECTION. Inspection is the process of measur-

48、ing, examining, testing, or otherwise comparing the unit of product (see 1.5) with the requirements. 1.4INSPECTION BY ATTRIBUTES. Inspection by attributes is inspection whereby either the unit of product is classifi ed simply as conforming or nonconforming, or the number of nonconformities in the un

49、it of products is counted, with respect to a given requirement or set of requirements. 1.5UNIT OF PRODUCT. The unit of product is the unit inspected in order to determine its classifi cation as con- forming or nonconforming or to count the number of non- conformities. It may be a single article, a pair, a set, a length, an area, an operation, a volume, a component of an end product, or the end product itself. The unit of product may or may not be the same as the unit of purchase, supply, pro- duction, or shipment. 2.DEFINITIONSAND TERMINOLOGY The defi nition