1. A note on multivariate capability indices
Winson Taam; Perla Subbaiah; James W. Liddy
Journal of Applied Statistics, 1360-0532, Volume 20, Issue 3, 1993, Pages 339 – 351
http://www.informaworld.com/smpp/content~db=all~content=a739172505~frm=titlelink?words=process|capability|index&hash=1120133678

2.A program to calculate bootstrap confidence intervals for the process capability index Cpk
Gary S. Wasserman; Hassan A. Mohsen; LeRoy A. Franklin
Communications in Statistics - Simulation and Computation, 1532-4141, Volume 20, Issue 2, 1991, Pages 497 – 510
http://www.informaworld.com/smpp/content~db=all~content=a780043708~frm=titlelink?words=process|capability|index&hash=1120133678

3. Multivariate Capability Indices: Distributional and Inferential Properties
W. L. Pearn; F. K. Wang; C. H. Yen
Journal of Applied Statistics, 1360-0532, Volume 34, Issue 8, 2007, Pages 941 – 962
http://www.informaworld.com/smpp/content~db=all~content=a782866593~frm=titlelink?words=pearn&hash=3546520734
4.Measuring Process Performance Based on Expected Loss with Asymmetric Tolerances
W. L. Pearn; Y. C. Chang; Chien-Wei Wu
Journal of Applied Statistics, 1360-0532, Volume 33, Issue 10, 2006, Pages 1105 – 1120
http://www.informaworld.com/smpp/content~db=all~content=a769666083~frm=titlelink?words=pearn&hash=3546520734
5.Testing process capability based on Cpm in the presence of random measurement errors
W. L. Pearn; M. H. Shu; B. M. Hsu
Journal of Applied Statistics, 1360-0532, Volume 32, Issue 10, 2005, Pages 1003 – 1024
http://www.informaworld.com/smpp/content~db=all~content=a727495660~frm=titlelink?words=pearn&hash=3546520734
6.New generalization of process capability index Cpk
W. L. Pearn
Journal of Applied Statistics, 1360-0532, Volume 25, Issue 6, 1998, Pages 801 – 810
http://www.informaworld.com/smpp/content~db=all~content=a713674617~frm=titlelink?words=pearn&hash=3546520734
7.APPLICATION OF CLEMENTS' METHOD FOR CALCULATING SECOND- AND THIRD-GENERATION PROCESS CAPABILITY INDICES FOR NON-NORMAL PEARSONIAN POPULATIONS
W. L. Pearn; Samuel Kotz
Quality Engineering, 1532-4222, Volume 7, Issue 1, 1994, Pages 139 – 145
http://www.informaworld.com/smpp/content~db=all~content=a776214848~frm=titlelink?words=pearn&hash=3546520734

8.Estimating process capability indices for non-normal pearsonian populations
Quality and Reliability Engineering International
Volume 11, Issue 5, Date: 1995, Pages: 386-388
W. L. Pearn, K. S. Chen
Abstract  |  References  |  Full Text: PDF (251K)