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Discussion One of "Latent Structures-Based Multivariate Statistical Process Control: A Paradigm Shift"

Summary: In this discussion of the article "Latent Structures-Based Multivariate Statistical Process Control: A Paradigm Shift" by Alberto Ferrer (Quality Engineering, Volume 26, Issue 1, pp. 72-91), Woodall focuses on some technical issues. These include monitoring of the variance-covariance matrix, and monitoring of the mean vector. The author emphasizes that many of the newer methods share much in common with the latent structure-based multivariate statistical process control (LSb-MSPC) methods advocated by Ferrer.

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  • Topics: Statistical Process Control (SPC)
  • Keywords: Statistical process control (SPC), Multivariate control charts, Control charts, Least squares, Principal components, Quality improvement (QI)
  • Author: Woodall, William H.;
  • Journal: Quality Engineering