• Control charts for variability monitoring in high-dimensional processes 

      Kim J.; Abdella G.M.; Kim S.; Al-Khalifa K.N.; Hamouda A.M. ( Elsevier Ltd , 2019 , Article)
      Monitoring process variability is associated with detecting changes in the covariance matrix of a multivariate normal process. Most monitoring methods estimate the sample covariance matrix and compare it with the in-control ...