South African Journal of Industrial Engineering
versão On-line ISSN 2224-7890
versão impressa ISSN 1012-277X
LEE, Ming Ha. Variable sampling rate hotelling's T2 control chart with runs rules. S. Afr. J. Ind. Eng. [online]. 2012, vol.23, n.1, pp.122-129. ISSN 2224-7890.
This study investigates the properties of the variable sampling rate Hotelling's T2 chart with runs rules. The average time to signal checking of the control chart is derived using a Markov chain approach. Numerical comparisons show that the variable sampling rate Hotelling's T2 chart with runs rules performs better than the variable sampling rate Hotelling's T2 chart without runs rules for small and moderate process mean shifts.