The design of EWMA control chart for average with type‐I censored data
International Journal of Quality & Reliability Management
ISSN: 0265-671X
Article publication date: 17 April 2009
Abstract
Purpose
The purpose of this paper is to establish an exponentially weighted moving average (EWMA) control chart for monitoring the mean level of Gompertz lifetimes with type‐I censoring.
Design/methodology/approach
The proposed control chart is developed based on the conditional expected values (CEVs). The control limits are determined numerically with an algorithm.
Findings
Compared with the EWMA CEV control charts of Zhang and Chen, numerical results indicate that the proposed control chart has good performance to detect mean shifts for Gompertz lifetimes either in decrease or in larger increase with type‐I censoring in terms of the average run length (ARL).
Originality/value
The paper shows that, based on the proposed method, practitioners can monitor the mean level of Gompertz lifetimes via an EWMA CEV control chart with type‐I censoring.
Keywords
Citation
Tsai, T. and Lin, C. (2009), "The design of EWMA control chart for average with type‐I censored data", International Journal of Quality & Reliability Management, Vol. 26 No. 4, pp. 397-405. https://doi.org/10.1108/02656710910950379
Publisher
:Emerald Group Publishing Limited
Copyright © 2009, Emerald Group Publishing Limited