Title :
An eigenvalue control charting for process variability monitoring
Author :
Noor, Anas M. ; Djauhari, Maman Abdurachman
Author_Institution :
Dept. of Math., Univ. Teknol. Malaysia, Skudai, Malaysia
Abstract :
This paper proposes a control charting of each eigenvalue of sample covariance matrix to monitor the shift in multivariate process variability. Its performance will be compared with sample generalized variance chart, the most widely used control charting in practice. A case study using a real industrial problem shows that both charts are complementary. They might give different signal.
Keywords :
control charts; covariance matrices; eigenvalues and eigenfunctions; process monitoring; statistical analysis; covariance matrix; eigenvalue control chart; generalized variance chart; process variability monitoring; Control charts; Covariance matrix; Eigenvalues and eigenfunctions; Monitoring; Process control; Quality control; control chart; multivariate process control; sample generalized variance;
Conference_Titel :
Quality and Reliability (ICQR), 2011 IEEE International Conference on
Conference_Location :
Bangkok
Print_ISBN :
978-1-4577-0626-4
DOI :
10.1109/ICQR.2011.6031611
