Multivariate multinomial T2 control chart using fuzzy approach

María Nela Pastuizaca Fernández, Andrés Carrión García and Omar Ruiz Barzola

International Journal of Production Research, 2015, vol. 53, issue 7, 2225-2238

Abstract: Quality of a product is often measured through various quality characteristics generally correlated. Multivariate control charts are a response to the need for quality control in such situations. If quality characteristics are qualitative, it sometimes happens that the product quality is defined by linguistic variables – where quality levels are represented by some specific words – and product units are classified into several linguistic forms categories, depending on the degree of fulfilment of expectations, creating a situation of fuzzy classifications. This study first reviews the concepts found in the literature on the development of fuzzy multivariate control charts. We propose a method to control these fuzzy quality evaluations, with correlated multiple attributes quality characteristics, through the use of a Hotelling T2 control chart.

Date: 2015
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DOI: 10.1080/00207543.2014.983617

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