Performance Comparisons of EWMA Control Chart Schemes

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dc.contributor.authorSimoes, Bruno F. T.
dc.contributor.authorEpprecht, Eugenio K.
dc.contributor.authorCosta, Antonio F. B. [UNESP]
dc.contributor.institutionPontifícia Universidade Católica do Rio de Janeiro (PUC-Rio)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:28:33Z
dc.date.available2014-05-20T13:28:33Z
dc.date.issued2010-09-01
dc.description.abstractCombining an EWMA chart with a Shewhart chart is traditionally recommended as a means of providing good protection against both small and large shifts in the process mean. Capizzi and Masarotto have proposed an EWMA chart with a variable smoothing constant (AEWMA) for the same purpose. In this paper, we optimize the designs of the AEWMA and of the combined EWMA-Shewhart schemes with regard to pairs of shifts in the process mean and compare their performances. When the schemes are optimized for the same pair of shifts, their ARL profiles practically coincide. The choice between the AEWMA and the EWMA-Shewhart scheme then becomes a matter of personal preference. We also explore using an AEWMA together with a Shewhart chart, but we find no performance improvement. An additional contribution of this paper is the tables of optimal designs of each scheme for several pairs of shifts.en
dc.description.affiliationPontif Catholic Univ Rio de Janeiro PUC Rio, Dept Ind Engn, Rio de Janeiro, Brazil
dc.description.affiliationSão Paulo State Univ UNESP, Dept Prod, Guaratingueta, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ UNESP, Dept Prod, Guaratingueta, SP, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent249-261
dc.identifierhttp://web.it.nctu.edu.tw/qtqm/
dc.identifier.citationQuality Technology and Quantitative Management. Taichung: Nctu-national Chiao Tung Univ Press, v. 7, n. 3, p. 249-261, 2010.
dc.identifier.issn1684-3703
dc.identifier.urihttp://hdl.handle.net/11449/9508
dc.identifier.wosWOS:000293058800004
dc.language.isoeng
dc.publisherNctu-national Chiao Tung Univ Press
dc.relation.ispartofQuality Technology and Quantitative Management
dc.relation.ispartofjcr0.662
dc.relation.ispartofsjr0,348
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectAdaptive control chartsen
dc.subjectARL profilesen
dc.subjectexponentially weighted moving averageen
dc.subjectstatistical process controlen
dc.subjectvariable parametersen
dc.subjectvariable smoothing constanten
dc.titlePerformance Comparisons of EWMA Control Chart Schemesen
dc.typeArtigo
dcterms.rightsHolderNctu-national Chiao Tung Univ Press
unesp.author.lattes6100382011052492[3]
unesp.author.orcid0000-0003-2133-1098[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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