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Title: Cumulative quantity control charts for monitoring production processes
Authors: Chan, L.Y.
Xie, M. 
Goh, T.N. 
Issue Date: 20-Jan-2000
Citation: Chan, L.Y.,Xie, M.,Goh, T.N. (2000-01-20). Cumulative quantity control charts for monitoring production processes. International Journal of Production Research 38 (2) : 397-408. ScholarBank@NUS Repository.
Abstract: Two commonly used statistical quality control charts, the c-chart and u-chart, are unsatisfactory for monitoring high-yield processes with low defect rates. To overcome this difficulty, a new type of control chart called the cumulative quantity control chart (CQC-chart) is introduced in this paper. The CQC-chart can be used no matter whether the process defect rate is low or not, and when the process defect rate is low or moderate the CQC-chart does not have the shortcoming of the c- and u-charts of showing up false alarm signals too frequently. The CQC-chart does not require rational subgrouping of samples (which is necessary for the c- and u-charts), and is appropriate for monitoring automated manufacturing processes.
Source Title: International Journal of Production Research
ISSN: 00207543
Appears in Collections:Staff Publications

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