The economic design for controlling the mean of non-normal variable

In 1971, Y. Nagendra and G. Rai studied the economic design for controlling the mean of non-normal variables. Their procedure consists of two equations to get the economic design. In this article, the present procedure only consists of solving an explicit equation for h (sampling interval) in terms of n (sample size) and k (control limit factor). The paper concludes that the model is not only more accurate, more applicable, and more flexible, but also simpler to solve than Y. Nagendra and G. Rai’s model.