Browsing Faculty of Natural and Agricultural Sciences by Subject "Sequential ranks"

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    • Sequential rank CUSUM charts for angular data 

      Lombard, F.; Hawkins, Douglas M.; Potgieter, Cornelis J. (Elsevier, 2017)
      A cumulative sum (CUSUM) control chart has desirable properties for checking whether a distribution has changed from an in-control to an out-of-control setting. Distribution-free CUSUMs based on sequential ranks to detect ...

    • Sequential rank CUSUMs for location and dispersion 

      Van Zyl, C.; Lombard, F. (SASA, 2018)
      We develop CUSUMs based on sequential ranks of the observations to detect changes over time in the location and dispersion of a distribution. The CUSUMs are distribution free in the sense that the appropriate control ...