2Kuang -Han Chen and Duane S. Boning and Roy E Welsh. Multivariate Statistical Process Control and Signature Analysis Using Eigenfactor Detection Methods [ R]. The 33rd Symposium on the Interface of Computer Science and Statistical. Costa Mesa, CA,June 2001.
3F K Wang. Comparison of three Multivariate process capability indices [J]. Journal of Quality Technolgy,2003,32(3) :263 - 275.
4R - S Guh and J D T Tannock, C O' Brien. IntelliSPG: a hybrid intelligence tool for on - line economical statistical process control [J]. Expert Systems with Application, 1999(17) : 195 - 212.
