Individual T-2 Control Chart for Compositional Data
dc.contributor.author
dc.date.accessioned
2015-09-17T06:21:00Z
dc.date.available
2015-09-17T06:21:00Z
dc.date.issued
2014-04
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dc.description.abstract
The usual Hotel ling T-2 control chart is not appropriate for monitoring processes where the quality characteristic is a mixture. The composition of mixtures are vectors of positive elements that represent parts of a whole, to which standard multivariate techniques are not appropriate due to their restricted sample space. There are many applications where a mixture is monitored against time, such as in the chemical industry, product composition, impurity profile, or gas components analysis. In this paper, a multivariate control chart for individual compositional observations based on the T-2 statistic is proposed and compared with the typical one in terms of average run length. We show how results are more consistent with compositional data nature and illustrate implementation in a real-world example
dc.description.sponsorship
This work has been partially financed by the Agencia de Gestio d'Ajuts Universitaris i de Recerca (Ref: 2009SGR424) and by the Ministerio de Ciencia e Innovacion (Ref: MTM2012-33236 and Ref: MTM2009-13272). The authors wish to thank the Universitat de Girona for the grant given to Marina Vives-Mestres during her doctoral studies
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application/pdf
dc.language.iso
eng
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American Society for Quality
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info:eu-repo/grantAgreement/MINECO//MTM2012-33236/ES/METODOS ESTADISTICOS EN ESPACIOS RESTRINGIDOS/
info:eu-repo/grantAgreement/MICINN//MTM2009-13272/ES/Analisis Estadistico De Datos Composicionales Y Otros Datos Con Espacio Muestral Restringido/
AGAUR/2009-2014/2009 SGR-424
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Versió postprint del document publicat a: http://search.proquest.com/docview/1516949494/fulltextPDF?accountid=15295
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© Journal of Quality Technology, 2014, vol. 46, núm. 2, p. 127-139
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Articles publicats (D-IMA)
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Tots els drets reservats
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dc.title
Individual T-2 Control Chart for Compositional Data
dc.type
info:eu-repo/semantics/article
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info:eu-repo/semantics/openAccess
dc.embargo.terms
Cap
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info:eu-repo/semantics/submittedVersion
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dc.relation.ProjectAcronym
dc.identifier.eissn
0022-4065