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http://dx.doi.org/10.5351/KJAS.2008.21.2.247

An Integrated Process Control Scheme Based on the Future Loss  

Park, Chang-Soon (Dept. of Statistics, Chung-Ang University)
Lee, Jae-Heon (Dept. of Statistics, Chung-Ang University)
Publication Information
The Korean Journal of Applied Statistics / v.21, no.2, 2008 , pp. 247-264 More about this Journal
Abstract
This paper considers the integrated process control procedure for detecting special causes in an ARIMA(0,1,1) process that is being adjusted automatically after each observation using a minimum mean squared error adjustment policy. It is assumed that a special cause can change the process mean and the process variance. We derive expressions for the process deviation from target for a variety of different process parameter changes, and introduce a control chart, based on the generalized likelihood ratio, for detecting special causes. We also propose the integrated process control scheme bases on the future loss. The future loss denotes the cost that will be incurred in a process remaining interval from a true out-of-control signal.
Keywords
Integrated process control; statistical process control; automatic process control; process adjustment; rectifying action; future loss;
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