Minimum risks chain sampling plans (ChSP-4(c1, c2,)) indexed by acceptable quality level and limiting quality level

In this paper, an approach for designing ChSP-4(c(1), c(2)) plans while minimizing the sum of risks when the sample size is fixed is described. A set of tables is presented which can be used for the selection of ChSP-4(c(1), c(2)) plans for desired values of the acceptable quality level and limiting quality level. Also, an improved procedure for constructing plans with a given operating ratio is provided