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Impact of Special Causes on First-Order System Feedback Process Adjustment  

Jun, Sang-Pyo (Department of General Education, Nam Seoul University)
Publication Information
Journal of the Korea Safety Management & Science / v.9, no.5, 2007 , pp. 49-55 More about this Journal
Abstract
A special cause producing temporary deviation in the underlying process can influence on process adjustment in First-Order System feedback control system. In this paper, the impact of special causes on the forecasts and the process adjustment that is based on the EWMA forecasts are derived for a first-order system. For some special causes with patterned type of contamination, the influence of the causes on the output process are explicitly investigated. A data set, contaminated by a special cause of level shift, is analyzed to confirm the impact numerically.
Keywords
Process Adjustment; First-Order System Feedback Control; Special Cause; EWMA;
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