Estimating the Economic Benefit from Improved Process Control

A method for the a priori estimation of the potential benefit that can be obtained from process control improvements is presented. The improved control benefit in this work arises from a shift in the mean operation toward a product specification or process constraint. The mean operation can be shift...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2003-10, Vol.42 (20), p.4535-4544
Main Author: Muske, Kenneth R
Format: Article
Language:English
Subjects:
Applied sciences
Computer science
control theory
systems
Control theory. Systems
Exact sciences and technology
Process control. Computer integrated manufacturing
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Summary:A method for the a priori estimation of the potential benefit that can be obtained from process control improvements is presented. The improved control benefit in this work arises from a shift in the mean operation toward a product specification or process constraint. The mean operation can be shifted toward the specification or constraint without increasing violation due to a reduction in the controlled variable variation attributable to the improved process control. The controlled variable variance reduction is determined based on minimum variance controller performance bounds. The shift in the mean operation is determined based on a specified fractional violation and cumulative probability distribution. The contribution of this work is a rigorous estimation method that can be used to economically justify and prioritize potential process control improvement projects. The method is illustrated using a waste heat recovery process where the estimated and actual benefits due to improved process control are compared.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie0210098