Accession Number : AD0610041

Title :   A GENERAL FAMILY OF CHAIN SAMPLING INSPECTION PLANS.

Descriptive Note : Technical rept. no. N-20,

Corporate Author : RUTGERS - THE STATE UNIV NEW BRUNSWICK N J

Personal Author(s) : Dodge,Harold F. ; Stephens,Kenneth S.

Report Date : 30 DEC 1964

Pagination or Media Count : 38

Abstract : This report proposes a general family of chain sampling inspection plans based on certain concepts incorporated in the 'chain sampling inspection plans' designated ChSP-1, published by Dodge (1955). A basic feature is the utilization of cumulative results for decision making, intended primarily for use when samples are small. Giving special attention to what is referred to as a general family of 'two stage' chain sampling plans for use in lot-by-lot inspections, the report develops the theory for and evaluates the statistical properties of that particular set of such plans that is characterized by acceptance numbers (cumulative results criteria, CRC) of C1 = 0 and C2 =1. The cumulation of results is restarted after each lot rejection, proceeds in two steps, but extends to and continues with a maximum of only k samples. Tabulated values (and some charts) are given for the OC curves for a collection of plans in which: (1) the size of sample from each lot, n, is 3,5,8,10,15, and 20; and (2) the maximum number of samples for cumulation, k varies from 2 to 10. (Author)

Descriptors :   (*QUALITY CONTROL, STATISTICAL ANALYSIS), (*STATISTICAL ANALYSIS, QUALITY CONTROL), (*SAMPLING, QUALITY CONTROL), DECISION MAKING, PRODUCTION CONTROL, STOCHASTIC PROCESSES, PRODUCTION, PROBABILITY, MATRICES(MATHEMATICS)

Distribution Statement : APPROVED FOR PUBLIC RELEASE