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Mathematical Problems in Engineering
Volume 2011, Article ID 575036, 15 pages
http://dx.doi.org/10.1155/2011/575036
Research Article

Mixed Variables-Attributes Test Plans for Single and Double Acceptance Sampling under Exponential Distribution

School of Finance and Statistics, East China Normal University, no. 500 Dongchuan Road, Shanghai 200241, China

Received 6 March 2011; Accepted 5 April 2011

Academic Editor: Ming Li

Copyright © 2011 Yan Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The mixed variables-attributes test plans for single acceptance sampling are proposed to protect “good lots” from attributes aspect and to optimize sample sizes from variables aspect. For the single and double mixed plans, exact formulas of the operating characteristic and average sample number are developed for the exponential distribution. Numerical illustrations show that the mixed sampling plans have some advantages over the variables plans or attributes plans alone.