Ítem
Ministerio de Economía y Competitividad (Espanya)
Generalitat de Catalunya. Agència de Gestió d’Ajuts Universitaris i de Recerca Ministerio de Ciencia e Innovación (Espanya) |
|
Vives Mestres, Marina
Daunis-i-Estadella, Pepus Martín Fernández, Josep Antoni |
|
abril 2014 | |
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 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 |
|
application/pdf | |
http://hdl.handle.net/10256/10932 | |
eng | |
American Society for Quality | |
info:eu-repo/semantics/altIdentifier/eissn/0022-4065 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 |
|
Tots els drets reservats | |
Anàlisi multivariable
Multivariate analysis |
|
Individual T-2 Control Chart for Compositional Data | |
info:eu-repo/semantics/article | |
DUGiDocs |