Single sampling plan, double sampling plan and sequential sampling plan are called conventional sampling plans.
Under these situations, Hald  derived operating characteristic (OC) function of the single sampling plan based on gamma-Poisson distribution.
Further, RGS plan is not nearly as efficient as the sequential sampling plan, but it is always more efficient than the single sampling plan.
If c1=c2=c (say), then the RGS plan will converge to the single sampling plan.
5] developed the selection of single sampling plan using Gamma-Poisson distribution.
In this section, we will make a comparative study on the results of the proposed plan with the gamma-Poisson single sampling plan of Vijayaraghavan et al.
Figure 1 provides the OC curves of gamma-Poisson RGS plan along with the gamma Poisson single sampling plan and conventional Poisson RGS plans, all having same AQL=0.
Dodge (1955) developed ChSP-1 to improve the single sampling plans having c=0 without increasing the sample size.
Dodge and Romig (1959) have proposed a procedure for the selection of a single sampling plan indexed through AOQL.
1975, "Maximum Allowable percent defective (MAPD) Single sampling Inspection by Attributes plans", Journal of Quality Technology, 7 (4) pp.