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- Title
Improving Shewhart control chart performance for monitoring the Weibull mean.
- Authors
Ho, Linda Lee; Fernandes, Fidel Henrique; Quinino, Roberto C.; Bourguignon, Marcelo
- Abstract
In this paper, we are interested in monitoring the stability of a Weibull process mean. We introduce a simplified variable sample size (SVSS) procedure, which consists of using alternately sample sizes nA and nB with nA>nB, to improve the performance of the traditional X¯ control chart (a fixed sample size n). Operationally, the proposal is relatively simple and its adoption yields a faster signal of an abnormal situation compared with the traditional X¯ chart in a variety of shifts. We present instructions for practitioners on how to design a control chart using the SVSS procedure. We also illustrate the proposed scheme through a numerical example.
- Publication
Quality & Reliability Engineering International, 2021, Vol 37, Issue 3, p984
- ISSN
0748-8017
- Publication type
Article
- DOI
10.1002/qre.2777