Table of Contents
Section1:GeneralIntroductiontoAcceptanceSampling
1.0Introduction
1.1Scope
1.2Objectofsamplinginspection
1.3Acceptancesampling
1.3.1Statisticalsampling
1.3.2Adhocsampling(samplingwithnostatistical
basis)
1.3.3100%inspectionofitems
1.3.4Othersamplingpractices
1.4Attributesorvariablesinspection
1.5Lotinspection
1.5.1Lot
1.5.2Lotsize
1.6Sequenceorisolated-lotinspection
1.6.1Lot-by-lotinspection
1.6.2Processimprovement
1.6.3Movinglots
1.6.4Largevs.smalllots
1.6.5Isolated-lotinspection
1.7Acceptablequalitylevel
1.7.1Description
1.7.2SettinganAQL
1.8Processaverage
1.9Limitingquality
1.10Normalandtightenedinspection
1.11Reducedinspection
1.12Switchingrules
1.13Averageoutgoingqualityanditslimit
1.14Item:unitofproduct
1.15Nonconformityandnonconformingitem
1.15.1Failuretoconform
1.15.2Nomenclature
1.15.3Classificationofnonconformities
1.16Hazardousnonconformities(defects)
1.17Curtailmentofinspection
1.18Disposalofunacceptablelots
1.19Singlesampling
1.20Operatingcharacteristiccurves
1.21Doublesampling
1.22Multiplesampling
1.23Sequentialsampling
1.24Skip-lotsampling
1.25Comparisonofsingle,double,multipleand
sequentialsampling
1.25.1Equivalentplans
1.25.2Averagesamplesize
1.26Drawingofsamples(randommethod)
1.27Samplingplans,schemes,andsystems
1.28Distributionalcharacteristics:binomial,
Possonandhypergeometric
Section2:TheANSI/ASQCZ1.4System
2.1DescriptionofANSI/ASQCA1.4
2.2Preparingaspecificationfortheusein
conjunctionwithANSI/ASQCZ1.4
2.3Classificationofnonconformitiesand
nonconformingitems
2.4Lots
2.5Meaningofinspectionlevel
2.6Settingandinspectionlevel
2.7PreferredAQLs
2.8NonpreferredAQLs
2.9SettingandAQL
2.10Drawingasamplingplanfromthetables
2.11Normalinspection
2.12Tightenedinspection
2.13Switchingrules-example
2.14Methodsforreducingthesamplingrisks
2.15Reducedinspection
2.16Doubleandmultiplesampling
2.17Limitingqualityandtheisolatedlot
2.18Samplesizes
2.19Operatingcharacteristiccurves
2.20TheAOQLtable(see1.13fortheory)
2.21Nomograms Abstract
Written to assist in the proper application of ASQC Z1.4. Much of what is included in this guide applies equally well to many other standards for the acceptance of lots by sampling procedures.
