Projections and theU2Multivariate Control Chart
作者:
RungerGeorge C.,
期刊:
Journal of Quality Technology
(Taylor Available online 1996)
卷期:
Volume 28,
issue 3
页码: 313-319
ISSN:0022-4065
年代: 1996
DOI:10.1080/00224065.1996.11979681
出版商: Taylor&Francis
关键词: Average Run Length;Chi-Square Control Charts;Multivariate Control Charts;Statistical Process Control
数据来源: Taylor
摘要:
A projection approach to designing multivariate control schemes is used that simplifies the construction and understanding of these charts. The method is applied to construct charts that are sensitive to specific assignable causes such as a mean shift that affects only a subset of the variables and a model-fixed assignable cause that can occur when one variable causes another. The projection results in a chart that is easy to compute and design and it has greater sensitivity than a chi-square chart for the assignable cause under study. Furthermore, the chart can be analyzed using the convenient central and noncentral chi square distributions when the process is on-target and off-target, respectively.
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