Hotelling's T² charts with variable control and warning limits
by Shashibhushan B. Mahadik
International Journal of Quality Engineering and Technology (IJQET), Vol. 3, No. 2, 2012

Abstract: The idea of variable control and warning limits (VCWL) is proposed for Hotelling's T² charts in order to improve their performances in detecting small shifts in the mean vector. Expressions for the performance measures for VCWL T² charts are developed. The performances of these charts are compared numerically with those of static T² charts. It is observed that the VCWL T² charts are significantly more efficient than the static T² charts in detecting the small shifts and as efficient as that in detecting moderate to large shifts.

Online publication date: Sat, 30-Aug-2014

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