This paper proposes a variable sampling interval multivariate T² control chart with sampling at fixed times, where samples are taken at specified equally spaced fixed time points and additional samples are allowed between these fixed times when indicated

The research discusses the implementation of control charts tools of MINITAB which are classified according to the type of data and the existence of subgrouping, weight and multivariate covariance. The paper presents the three integrated models by the use of zone, multivariate T2-GV(Generalized Variance) and ARIMA(Autoregressive Integrated Moving Average).