Monitoring the Mean Vector and the Covariance Matrix of Bivariate Processes

This paper proposes the joint use of two charts based on the non-central chi-square statistic (NCS statistic) for monitoring the mean vector and the covariance matrix of bivariate processes, named as the joint NCS charts. The expression to compute the ARL, which is defined as the average number of s...

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Bibliographic Details
Main Authors: Marcela Aparecida Guerreiro Machado, Antônio Fernando Branco Costa
Format: Article
Language:English
Published: Associação Brasileira de Engenharia de Produção (ABEPRO) 2010-02-01
Series:Brazilian Journal of Operations & Production Management
Online Access:http://abepro.org.br/bjopm/index.php/bjopm/article/view/11