Consider a T2 control chart for monitoring p = 10 quality characteristics. Suppose that the subgroup size is n= 3 and there are 25 preliminary samples available to estimate the sample covariance matrix. Calculate both the phase I and the phase II control limits (use a = 0.01).
p = 10 quality characteristics, n = 3 sample size, m = 25 preliminary samples. Assume a = 0.01.