A new control chart for exponential distributed life using EWMA. (February 2015)

• Record Type: Journal Article
• Authors: Aslam, Muhammad; Azam, Muhammad; Jun, Chi-Hyuck
• Is Part Of: Transactions of the Institute of Measurement and Control. Volume 37:Number 2(2015)
• Page Start: 205
• Page End: 210
• Publication Date: 2015-02
• Subjects: Average run length -- EWMA -- exponential distribution; Automatic control -- Periodicals; Measuring instruments -- Periodicals; Commande automatique -- Périodiques; Mesure -- Instruments -- Périodiques; 681.2
• DOI: 10.1177/0142331214537293
• Languages: English
• ISSNs: 0142-3312

Abstract

In this paper, we present a new control chart for exponentially distributed quality characteristics using variable transformation and exponentially weighted moving average (EWMA). The in-control and out-of-control average run lengths (ARLs) are derived using the normal approximation. The parameters of the proposed control chart are determined by considering the target in-control ARL. The efficiency of the proposed control chart is discussed in terms of ARLs over the existing control chart without using EWMA. The application of the proposed control chart is discussed with the help of a real example.