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2012 | OriginalPaper | Chapter

Process Adjustment Control Chart for Simultaneous Monitoring of Process Capability and State of Statistical Control

Authors : Hironobu Kawamura, Ken Nishina, Tomomichi Suzuki

Published in: Frontiers in Statistical Quality Control 10

Publisher: Physica-Verlag HD

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Abstract

In the production of chemicals, a process adjustment such as feedback control is frequently used to reduce process variability. It is very important to judge whether or not the adjustment should be done automatically because an automatic process control (APC) system requires a large capital investment. This paper presents the determination of the adjustment timing on the basis of the process capability, and control charts combining information about the state of statistical control and process capability are also presented for the judgment of adjustment timing. Practitioners can assess both the adjustment interval and the number of adjustments by simulation or trial using the presented method. Moreover, the information is very useful for judging whether or not the automatic adjustment system should be introduced.

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Metadata
Title
Process Adjustment Control Chart for Simultaneous Monitoring of Process Capability and State of Statistical Control
Authors
Hironobu Kawamura
Ken Nishina
Tomomichi Suzuki
Copyright Year
2012
Publisher
Physica-Verlag HD
DOI
https://doi.org/10.1007/978-3-7908-2846-7_9

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