Verification Error in Single Sampling Inspection Plans for Processing Survey Data

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Abstract
This article deals with measurement error in single sampling inspection plans of the attributes type. Formulas are provided to assess the effect of inefficient inspection and correction on the power of the sampling plan to distinguish between acceptable and unacceptable quality levels, on average outgoing quality, and on costs. Emphasis is placed on the error of classifying defectives as nondefectives (Type II) made by both inspectors (called “verifiers”) of sample items and by correctors of items in rejected lots. Type I errors are mentioned under conditions peculiar to preparing data for machine processing in which nondefective items are regarded as defectives and changed to incorrect ones.

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