SANS 2859-1-2004 Sampling procedures for inspection by attributes Part 1 Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection《按属性检查的取样程序 第1部分 按照验收质量.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 03.120.30 ISBN 0-626-15900-8 SANS 2859-1:2004 Edition 1 and ISO tech. corr. 1 ISO 2859-1:1999 Edition 2 and tech. corr. 1SOUTH AFRICAN NATIONAL STAND

4、ARD Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection This national standard is the identical implementation of ISO 2859-1:1999 and technical corrigendum 1, and is adopted with the permission of the Internati

5、onal Organization for Standardization. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code +27 12 www.stansa.co.za Standards South Africa This standard may only be used and printed by approved subscrip

6、tion and freemailing clients of the SABS.SANS 2859-1:2004 Edition 1 and ISO tech. corr. 1 ISO 2859-1:1999 Edition 2 and tech. corr. 1 Table of changes Change No. Date Scope ISO tech. corr. 1 2001 Amended to correct the sample size for sample size code letter H in the table on single sampling plans f

7、or reduced inspection (auxiliary master table). Abstract Specifies an acceptance sampling system for inspection by attributes. Is indexed in terms of the acceptance quality limit (AQL). Its purpose is to induce a supplier through the economic and psychological pressure of lot non-acceptance to maint

8、ain a process average at least as good as the specified acceptance quality limit, while at the same time providing an upper limit for the risk to the consumer of accepting the occasional poor lot. Keywords acceptance (approval), characteristics, consumer-supplier relations, defects, definitions, err

9、ors, inspection, inspection by attributes, methods, procedures, quality assurance, quality control, quality management, sampling, sampling methods, sampling tables, statistical methods of analysis, statistical quality control, statistics, testing. National foreword This South African standard was ap

10、proved by National Committee StanSA TC 176, Quality assurance and quality management matters, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This standard may only be used and printed by approved subscription and freemailing clients of t

11、he SABS.ICS 03.120.30 Ref. No. ISO 2859-1:1999/Cor.1:2001(E) ISO 2001 All rights reserved Printed in Switzerland INTERNATIONAL STANDARD ISO 2859-1:1999 TECHNICAL CORRIGENDUM 1 Published 2001-03-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION Sampling pr

12、ocedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection TECHNICAL CORRIGENDUM 1 Rgles dchantillonnage pour les contrles par attributs Partie 1: Procdures dchantillonnage pour les contrles lot par lot, indexs daprs le niveau d

13、e qualit acceptable (NQA) RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to International Standard ISO 2859-1:1999 was prepared by Technical Committee ISO/TC 69, Applications of statistical methods, Subcommittee SC 5, Acceptance sampling. Page 83, Table 11-C In the column “Sample size” correspondi

14、ng to the row for sample size code letter H, replace the value “50” with the value “20”.This standard may only be used and printed by approved subscription and freemailing clients of the SABS.This page is intentionally left blankThis standard may only be used and printed by approved subscription and

15、 freemailing clients of the SABS.A Referencenumbe r ISO28591:1999 (E) INTERNATIONAL STANDARD ISO 28591 Secondedition 19991115 Samplingproceduresforinspectionby attributes Part1: Samplingschemesindexedbyacceptance qualitylimit(AQL)forlotbylotinspection Rglesdchantillonnagepourlescontrlesparattributs

16、Partie1:Procduresdchantillonnagepourlescontrleslotparlot, indexsdaprsleniveaudequalitacceptable(NQA)This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO28591:1999(E) ISO1999 Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybe

17、reproducedorutilizedinanyformorbyan ymeans,electronic ormechanical,includingphotocopyingandmicrofilm,withoutpermissioninwritingfromthepublisher. InternationalOrganizationforStandardization Casepostale56 CH1211Genve20 Switzerland Internet isoiso.ch PrintedinSwitzerland ii Contents 1Scope 1 2Normative

18、references . .2 3Terms,definitionsandsymbols. 2 4Expressionofnonconformity .7 5Acceptancequalitylimit(AQL). 8 6Submissionofproductforsampling. 8 7Acceptanceandnonacceptance.9 8Drawingofsamples. 9 9Normal,tightenedandreducedinspection. 10 10Samplingplans 13 11Determinationofacceptability .14 12Furthe

19、rinformation . 14 13Fractionalacceptancenumberplansforsinglesampling (optional) 16 Tables 1Samplesizecodeletters 19 2ASinglesamplingplansfornormalinspection(Mastertable) 20 2BSinglesamplingplansfortightenedinspection(Mastertable) . 21 2CSinglesamplingplansforreducedinspection(Mastertable). .22 3ADou

20、blesamplingplansfornormalinspection(Mastertable) 23 3BDoublesamplingplansfortightenedinspection(Mastertable). .24 3CDoublesamplingplansforreducedinspection(Mastertable) . .25 4AMultiplesamplingplansfornormalinspection(Mastertable) .26 4BMultiplesamplingplansfortightenedinspection(Mastertable). 29Thi

21、s standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO ISO28591:1999(E) iii 4CMultiplesamplingplansforreducedinspection(Mastertable). 32 5AProducersriskfornormalinspection . . 35 5BProducersriskfortightenedinspection 36 5CProducersriskforreducedinspe

22、ction 37 6AConsumersriskqualityfornormalinspection . 38 6BConsumersriskqualityfortightenedinspection . 39 6CConsumersriskqualityforreducedinspection . 40 7AConsumersriskqualityfornormalinspection . 41 7BConsumersriskqualityfortightenedinspection . 42 7CConsumersriskqualityforreducedinspection . 43 8

23、AAverageoutgoingqualitylimitsfornormalinspection(Singlesamplingplans). 44 8BAverageoutgoingqualitylimitsfortightenedinspection(Singlesamplingplans) 45 9Averagesamplesizecurvesforsingle,doubleandmultiplesampling(normal,tightenedandreduced inspection) 46 10ATablesforsamplesizecodeletterA(Individualpla

24、ns) 48 10BTablesforsamplesizecodeletterB(Individualplans) 50 10CTablesforsamplesizecodeletterC(Individualplans) 52 10DTablesforsamplesizecodeletterD(Individualplans) 54 10ETablesforsamplesizecodeletterE(Individualplans) 56 10FTablesforsamplesizecodeletterF(Individualplans) . 58 10GTablesforsamplesiz

25、ecodeletterG(Individualplans) 60 10HTablesforsamplesizecodeletterH(Individualplans) 62 10JTablesforsamplesizecodeletterJ(Individualplans) . 64 10KTablesforsamplesizecodeletterK(Individualplans) 66 10LTablesforsamplesizecodeletterL(Individualplans) . 68 10MTablesforsamplesizecodeletterM(Individualpla

26、ns) . 70 10NTablesforsamplesizecodeletterN(Individualplans) 72 10PTablesforsamplesizecodeletterP(Individualplans) 74 10QTablesforsamplesizecodeletterQ(Individualplans) 76 10RTablesforsamplesizecodeletterR(Individualplans) 78 10STablesforsamplesizecodeletterS(Individualplans) 80This standard may only

27、 be used and printed by approved subscription and freemailing clients of the SABS.ISO28591:1999(E) ISO iv 11ASinglesamplingplansfornormalinspection(Auxiliarymastertable) . 81 11BSinglesamplingplansfortightenedinspection(Auxiliarymastertable).82 11CSinglesamplingplansforreducedinspection(Auxiliarymas

28、tertable) .8 3 12SchemeOCcurves(Normalized) 84 AnnexA (informative) Examplefornonconstantsamplingplan 85 Bibliography87This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO ISO28591:1999(E) v Foreword ISO(theInternationalOrganizationforStandardiz

29、ation)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalor

30、ganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. Draft

31、InternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO28591waspreparedbyTechnicalCommitteeISO/TC69, Applicationsofstatistical methods,Subcomm

32、itteeSC5, Acceptancesampling . ThissecondeditionofISO28591cancelsandreplacesthefirstedition(ISO28591:1989)ofwhichitconstitutesa technicalrevision. Significantchangesinthiseditioninclude: anewprocedureforswitchingfromnormaltoreducedinspection; areferencetoskiplotsamplingasanalternativetoreducedinspec

33、tion; theterm“limitingquality“hasbeenchangedto“consumersriskquality“intheheadingofTables6A,6B,6C, 7A,7Band7C; anewtablehasbeenaddedgivingproducersriskastheprobabilityofrejectionoflotswithpercent nonconformingequaltotheAQL; optionalfractionalacceptancenumberplanshavebeenadded;thepurposeoftheseplansis

34、toprovidea consistentprogressionfromtheplansforacceptancenumberzerototheacceptancenumber1plans.The fractionalacceptancenumberplansarefoundinTables11A,11Band11C,wheretheytaketheplaceofthe arrowsinthecorrespondingpositionsintables2A,2Band2C; reducedplanshavebeenchangedtoeliminatethegapbetweentheaccept

35、anceandrejectionnumbers; somechangeshavebeenmadetothedoublesamplingplanstoprovideasmalleraveragesamplesize; multiplesamplingplanshavebeenchangedtofivestagesratherthanseven.Thechangehasnotincreased theaveragesamplesize.Someofthenewplanshaveasmalleraveragesamplesizethantheircounterpartsin thepreviouse

36、dition; schemeoperatingcharacteristiccurveshavebeenaddedasTable12. ISO2859consistsofthefollowingparts,underthegeneraltitle Samplingproceduresforinspectionbyattributes : Part0:IntroductiontotheISO2859attributesamplingsystem Part1:Samplingschemesindexedbyacceptancequalitylimit(AQL)forlotbylotinspectio

37、n Part2:Samplingplansindexedbylimitingquality(LQ)forisolatedlotinspectionThis standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO28591:1999(E) ISO vi Part3:Skiplotsamplingprocedures ItishighlyrecommendedthatthispartofISO2859beusedtogetherwithISO2859

38、0,whichcontainsillustrative examples. AnnexAofthispartofISO2859isforinformationonly.This standard may only be used and printed by approved subscription and freemailing clients of the SABS.INTERNATIONALSTANDARD ISO ISO28591:1999(E) 1 Samplingproceduresforinspectionbyattributes Part1: Samplingschemesi

39、ndexedbyacceptancequalitylimit(AQL)for lotbylotinspection 1Scope 1.1 ThispartofISO2859specifiesanacceptancesamplingsystemforinspectionbyattributes.Itisindexedin termsoftheacceptancequalitylimit(AQL). Itspurposeistoinduceasupplierthroughtheeconomicandpsychologicalpressureoflotnonacceptancetomaintain

40、aprocessaverageatleastasgoodasthespecifiedacceptancequalitylimit,whileatthesametimeprovidinganupper limitfortherisktotheconsumerofacceptingtheoccasionalpoorlot. SamplingschemesdesignatedinthispartofISO2859areapplicable,butnotlimited,toinspectionof enditems, componentsandrawmaterials, operations, mat

41、erialsinprocess, suppliesinstorage, maintenanceoperations, dataorrecords,and administrativeprocedures. 1.2 Theseschemesareintendedprimarilytobeusedforacontinuingseriesoflots,thatis,aserieslongenoughto allowtheswitchingrules(9.3)tobeapplied.Theserulesprovide: a) aprotectiontotheconsumer(bymeansofaswi

42、tchtotightenedinspectionordiscontinuationofsampling inspection)shouldadeteriorationinqualitybedetected; b) anincentive(atthediscretionoftheresponsibleauthority)toreduceinspectioncosts(bymeansofaswitchto reducedinspection)shouldconsistentlygoodqualitybeachieved. SamplingplansinthispartofISO2859mayals

43、obeusedfortheinspectionoflotsinisolationbut,inthiscasetheuser isstronglyadvisedtoconsulttheoperatingcharacteristiccurvestofindaplanthatwillyieldthedesiredprotection(see 12.6).Inthatcase,theuserisalsoreferredtothesamplingplansindexedbylimitingquality(LQ)giveninISO28592.This standard may only be used

44、and printed by approved subscription and freemailing clients of the SABS.ISO28591:1999(E) ISO 2 2Normative references Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thispartofISO2859.Fordatedreferences,subs equentamendmentsto,orrevisionsof,anyofthesepublications donotapply.However,partiestoagreementsbasedonthispartofISO 2859areencouragedtoinvestigatethe possibilityofapplyingthemostrecenteditionsofthenormativedocumentsindicatedbelow.Forundated references,thelatesteditionof