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.
 developed the selection of single sampling plan using Gamma-Poisson distribution.
Various types of acceptance sampling plans like single sampling plan, double sampling plan, multiple sampling plan, sequential sampling plan, resampling schemes, repetitive group sampling plan, group acceptance sampling plan, and skip-lot sampling plans have been proposed for the attributes (just classifying the products as good or bad) and variables (measurement data) quality characteristics.
The skip-lot sampling plan (SkSP) provides a smaller sample size for the inspection purpose as compared to the single sampling plan.
They have derived the performance measures of the resampling scheme having single sampling attributes plan as the reference plan.
In this section, we will compare the proposed plan with SkSP-2 and the single sampling plan which is the reference sampling plan in terms of probability of acceptance (Pa), average sample number (ASN), and average total inspection (ATI).
The probability of acceptance from the single sampling plan when p = 0.02 is almost 96%, from SkSP-2 is almost 98%, and from the proposed plan the lot acceptance probability is almost 99%.