正版 ISO 22514-6- Word格式.docx

正版 ISO 22514-6- Word格式.docx

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Partie6:

Statistiquesdecapabilitypourunprocessuscaracteriseparunedistributionnormalemultivariee

Referencenumber

ISO22514-6:

2013（E）

COPYRIGHTPROTECTEDDOCUMENT

©

ISO2013

Allrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO’smemberbodyinthecountryoftherequester.

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PublishedinSwitzerland

Contents Page

Foreword iv

Introduction v

1 Scope 1

2 Normativereferences 1

3 Termsanddefinitions 1

4 Abbreviatedterms 3

5 Processanalysis 4

6 Useofmultivariateprocesscapabilityandperformanceassessment 4

7 Calculationofprocesscapabilityandprocessperformance 4

7.1 DescriptionofTypesIandII 4

7.2 Designationandsymbolsoftheindices 5

7.3 TypesIcandlieprocesscapabilityindex 8

7.4 TypesIlaandTypelibprocesscapabilityindex 10

8 Examples 11

8.1 Two-dimensionalpositiontolerances 11

8.2 Positionanddimensionofaslot 16

AnnexA（informative）Derivationofformulae 20

AnnexB（informative）Shaftimbalanceexample 25

AnnexC（informative）Holepositionexample 29

AnnexD（informative）Constructionofthequalityfunction 33

Bibliography 34

Foreword

ISO（theInternationalOrganizationforStandardization）isaworldwidefederationofnationalstandardsbodies（ISOmemberbodies）.TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission（IEC）onallmattersofelectrotechnicalstandardization.

InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part2.

ThemaintaskoftechnicalcommitteesistoprepareInternationalStandards.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting.PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote.

Attentionisdrawntothepossibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.

ISO22514-6waspreparedbyTechnicalCommitteeISO/TC69,Applicationsofstatisticalmethods,SubcommitteeSC4,Applicationsofstatisticalmethodsinprocessmanagement.

ISO22514consistsofthefollowingparts,underthegeneraltitleStatisticalmethodsinprocessmanagement—Capabilityandperformance:

— Part1:

Generalprinciplesandconcepts

— Part2:

Processcapabilityandperformanceoftime-dependentprocessmodels

— Part3:

Machineperformancestudiesformeasureddataondiscreteparts

— Part4:

Processcapabilityestimatesandperformancemeasures[TechnicalReport]

— Part5:

Processcapabilitystatisticsforattributecharacteristics

— Part6:

Processcapabilitystatisticsforcharacteristicsfollowingamultivariatenormaldistribution

— Part7:

Capabilityofmeasurementprocesses

— Part8:

Machineperformanceofamulti-stateproductionprocess

Introduction

Duetotheincreasedcomplexityoftheproductionmethodsandtheincreasingqualityrequirementsforproductsandprocesses,aprocessanalysisbasedonunivariatequantitiesisinmanycasesnotsufficient.

Instead,itmaybenecessarytoanalysetheprocessonthebasisofmultivariateproductquantities.Thiscan,forinstance,beinsuchcaseswheregeometrictolerances,dynamicmagnitudessuchasimbalance,correlatedquantitiesofmaterialsorotherproceduralproductsareobserved.

ByanalogywithISO22514-2,ISO22514-6providescalculationformulaeforprocessperformanceandprocesscapabilityindices,whichtakeintoconsiderationprocessdispersionaswellasprocesslocationasanextensiontothecorrespondingindicesforunivariatequantities.TheindicesproposedareindeedbasedontheclassicalCpandCpkindicesfortheone-dimensionalca