Browsing Mathematics, Statistics & Physics by Subject "Phase I"

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    • Multivariate coefficient of variation control charts in phase I of SPC 

      Abbasi S.A.; Adegoke N.A. ( Springer London , 2018 , Article)
      Multivariate control charts are mostly available for monitoring the process mean vector or the covariance matrix. Recently, work has been done on monitoring the multivariate coefficient of variation (CV) in phase II of the ...

    • On the performance of coefficient of variation control charts in Phase I 

      Dawod A.B.A.; Abbasi S.A.; Al-Momani M. ( John Wiley and Sons Ltd , 2018 , Article)
      Control charts are mainly carried out in 2 interconnected phases: Phase I (retrospective phase) and Phase II (monitoring phase). Phase I uses a stable historical sample to establish control limits that will be used later ...