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Computer Programs: Computing the Average Outgoing Quality after Multiple Inspections

Summary: A computationally convenient expression is found for the average outgoing quality (AOQ) in the situation where a product is subjected to multiple 100% inspections, each item possesses several characteristics that are to be inspected, the two types of inspection errors depend on the particular characteristic but not on the inspector, and an item is classified as nonconforming if any of its characteristics are classified as nonconforming. Programs in FORTRAN and in BASIC that perform the necessary computations are provided. It is also shown that the logarithm of the AOQ after n inspections is a linear function of n, and the rate of decrease depends only on the two types of errors associated with classifying an item as conforming or nonconforming.

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  • Topics:
  • Keywords: Computer programs
  • Author: Nelson, Peter R.; Jaraiedi, Majid; Rodriguez, Robert N. (edited by)
  • Journal: Journal of Quality Technology