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qcc: An R package for quality control charting and ...

,June200411qcc:AnR packageforqualitycontrolchartingandstati sticalprocesscontrolbyLucaScruccaIntrodu ctionTheqccpackagefortheR statisticalenvironmental-lowsto: plotShewhartqualitycontrolchartsforconti n-uous,attributeandcountdata; plotCusumandEWMA chartsforcontinuousdata; drawoperatingcharacteristiccurves; performprocesscapabilityanalyses; startedwritingthepackagetoprovidethestu- dentsintheclassI teacha toolforlearningthebasicconceptsofstatist icalqualitycontrol, attheintroduc-torylevelofa booksuchasMontgomery(2000).Duetotheinten ded nalusers,a freestatisticalenviron-mentwasimportanta ndR wasa ,albeititwaswrittenfromscratch,re ectedthesetoffunctionsavailablein , duringthedevelopmentI addedmore toolsandre-designedmostofthelibrarytomee ttherequire-mentsI thoughtwere thebasicbuilding ,whichinitssimplestformrequirestwoargume nts:adataframe,a matrixora vectorcontai

charting and statistical process control by Luca Scrucca Introduction The qcc package for the R statistical environment al-lows to: Ł plot Shewhart quality control charts for contin- ... the process is said to be fiout of controlfl and actions are to be taken to nd, and possibly eliminate, such causes. A process is declared to be fiin ...

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