TWO-STAGE CHAIN SAMPLING INSPECTION PLANS WITH DIFFERENT SAMPLE SIZES IN THE TWO STAGES.
RUTGERS - THE STATE UNIV NEW BRUNSWICK N J STATISTICS CENTER
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This report presents a further generalization of the family of two-stage chain sampling inspection plans--the use of different sample sizes in the two stages. Plans presented in previous reports specify the use of the same sample size in both stages. Evaluation of the operating characteristics is accomplished by the Markov chain approach developed in the preceding reports. Markov chains for a number of plans are included and several algebraic solutions are developed. Since these plans involve a variable amount of sampling, an evaluation of the average sample number ASN is developed. OC curves are presented and discussed for plans with acceptance numbers, C sub 1, C sub 2 0,1 0,2, 1,2 and 0,3, 1,3 and sample sizes, n sub 1, n sub 2 10,5 20,10 and 200,100. ASN curves for the same plans for n sub 1, n sub 2 200,100 are also presented. Then to compare the two-sample-size plans with plans having only one sample size, OC curves for a number of each of these types of plans are presented. Comparisons indicate that improved discrimination is achieved by the two-sample-size plans. Author
- Statistics and Probability
- Manufacturing and Industrial Engineering and Control of Production Systems