Statistical process control procedures for correlated observations
作者:
Thomas J. Harris,
William H. Ross,
期刊:
The Canadian Journal of Chemical Engineering
(WILEY Available online 1991)
卷期:
Volume 69,
issue 1
页码: 48-57
ISSN:0008-4034
年代: 1991
DOI:10.1002/cjce.5450690106
出版商: Wiley Subscription Services, Inc., A Wiley Company
关键词: statistical process control;cumulative sum;Shewhart chart;exponentially weighted moving average;serial correlation;Kalman filtering;time series
数据来源: WILEY
摘要:
AbstractMeasurements from industrial processes are often serially correlated. The impact of this correlation on the performance of the cumulative sum and exponentially weighted moving average charting techniques is investigated in this paper. It is shown that serious errors concerning the “state of statistical process control” may result if the correlation structure of the observations is not taken into account. The use of time series methods for coping with serially correlated observations is outlined. Paper basis weight measurements are used to illustrate the time series methodol
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