DocumentCode :
585204
Title :
New control chart for multivariate process
Author :
Sze Jeeu Fong ; Sze San Nah ; Pooi Ah Hin
Author_Institution :
Dept. of Comput. Sci. & Math., Univ. Malaysia Sarawak, Kota Samarahan, Malaysia
fYear :
2012
fDate :
10-12 Sept. 2012
Firstpage :
1
Lastpage :
5
Abstract :
The Hotelling T2 control chart is widely used to monitor the process mean vector in multivariate quality control. However, this control chart is relatively insensitive to small and moderate shifts in the process mean as it uses information only from the current sample. A new type of control chart is proposed to detect shift of the mean of a vector of two quality characteristics which are normally distributed. The acceptance region for declaring that the process is in control is a circle of which the centre depends on the mean based on the all the previous data. By using simulation, the performance of the new chart as measured by the average run length is found to be better than that of the Hotelling T2 control chart.
Keywords :
control charts; process monitoring; quality control; statistical process control; Hotelling T2 control chart; acceptance region; average run length; circle centre; multivariate quality control process; normally distributed quality characteristics; process mean vector monitoring; Control charts; Monitoring; Process control; Quality control; Robustness; Standards; Vectors; Average run length; Hotelling T2 control chart;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Statistics in Science, Business, and Engineering (ICSSBE), 2012 International Conference on
Conference_Location :
Langkawi
Print_ISBN :
978-1-4673-1581-4
Type :
conf
DOI :
10.1109/ICSSBE.2012.6396609
Filename :
6396609
Link To Document :
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