Lee Ho, Linda; Quinino, Roberto Costa - In: International Journal of Production Economics 145 (2013) 1, pp. 263-267
alternative to the use of an X¯ chart. Motivated by the simplicity of this control chart and its good performance, the possibility … of using a similar chart, an npS2 control chart, to monitor the variability of a process was explored, and the results … are described in this paper. A comparison of the proposed npS2 control chart with the S2 and R control charts is presented …