Summary
The present study incorporates an important practical entity in the study of economic\(\bar X\)-charts. The process model assumes, in addition to other things, that the in-control level has a prior probability distribution, instead of being fixed. The loss-cost function is derived as a main result. A numerical study is further made to investigate properties of the economic optimum control charts. It is found that complete knowledge about the shape of the prior distribution is not vital to the optimum solution provided that its mean and variance can be accurately determined. Optimum values of all the three control variables are substantially larger than those for the old process model with a fixed in-control level.
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Chiu, W.K., Leung, M.P.Y. A new Bayesian approach to quality control charts. Metrika 27, 243–253 (1980). https://doi.org/10.1007/BF01893602
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DOI: https://doi.org/10.1007/BF01893602