An expected cost model for the fraction defective control chart for the case where there are several out-of-control states is developed. A procedure is presented for determining the sample size, control limit or critical region, and interval between samples which minimizes the expected cost of...

Erratum To "Economic Design of Fraction Defective Control Charts" By Montgomery, Heikes and Mance, Management Sci. 21 (11, July) (1975).

An approximate cost model for a quality control procedure for two or more related variables is investigated. A method is presented to determine the optimal sample size, interval between samples, and critical region parameter for the Hotelling T² control chart. This model is a multivariate analog...