“…A multivariate FD method take into account the correlation between the process variables while univariate FD methods do not. Multivariate statistical monitoring methods include the latent variable methods, e.g., partial least square (PLS) regression, principal component analysis (PCA), canonical variate analysis (CVA), independent component analysis (ICA), (Chaing et al (2001); Venkatasubramanian et al (2003b)), neural networks (Subbaraj and Kannapiran (2010)), Fuzzy systems (Dexter and Benouarets (1996)) as well as the pattern recognition methods (Mohammadi and Asgary (2005)). …”