Minimax control chart uses the joint probability distribution of the maximum and minimum standardized sample means to obtain the control limits for monitoring purpose. However, the derivation of the ...

In many industrial applications, the output of a process characterized by p variables that are measured simultaneously. Independent variables can be charted individually, but if the variables are ...

Abstract: It is well known that artificial neural networks (ANNs) are adaptable or plastic multivariate models and then can be modeled to solve complex statistical prediction and pattern recognition ...

Abstract: A large number of processes nowadays are complex and characterized by the presence of several quality variables. In most cases these variables are interrelated and therefore the need arises ...

In this situation, it was shown by Gnanadesikan and Kettenring (1972), using a result of Wilks (1962), that T 2 i is exactly distributed as a multiple of a variable with a beta distribution.

In Part I of this article series, the authors discussed the regression control chart method for identifying out-of-trend data in pharmaceutical stability studies. In Part II, the by-time-point method ...