Browsing Natural and Agricultural Sciences by UP Author "Coelho, M.L.I."

Browsing Natural and Agricultural Sciences by UP Author "Coelho, M.L.I."

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  • A comparison of Phase I control charts 
    Coelho, M.L.I.; Chakraboti, S.; Graham, Marien Alet (Southern African Institute for Industrial Engineering, 2015-08)
    A carefully done Phase I analysis is a vital part of an overall statistical process control and monitoring regime. Distribution-free control charts can play a useful role in this analysis, as a parametric model assumption ...
  • Nonparametric signed‐rank control charts with variable sampling intervals 
    Coelho, M.L.I.; Graham, Marien Alet; Chakraborti, Subhabrata (Wiley, 2017-12)
    Variable sampling interval (VSI) charts have been proposed in the literature for normal theory (parametric) control charts and are known to provide performance enhancements. In the VSI setting, the time between monitored ...