A Combined Shewhart–Cumulative Score Quality Control Chart

Matoteng M. Ncube and William H. Woodall

Journal of the Royal Statistical Society Series C, 1984, vol. 33, issue 3, 259-265

Abstract: The proposed Shewhart–cumulative score quality control scheme combines the features of the Shewhart (1931) chart and the cumulative score procedure of Munford (1980) for monitoring the mean of a continuous production process. Simple methods are presented for determining the average run lengths of one‐ and two‐sided versions of the procedure. The proposed scheme is considerably more sensitive to shifts in the process mean that either the Shewhart or the cumulative score procedures.

Date: 1984
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