Browsing Mathematics, Statistics & Physics by Author "Ajadi, Jimoh Olawale"
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Multivariate Mixed EWMA-CUSUM Control Chart for Monitoring the Process Variance-Covariance Matrix
Muhammad; Ajadi, Jimoh Olawale; Mahmood, Tahir; Abbasi, Saddam Akber ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)The dispersion control charts monitor the variability of a process that may increase or decrease. An increase in dispersion parameter implies deterioration in the process for an assignable cause, while a decrease in ... -
Nonparametric multivariate covariance chart for monitoring individual observations
Adegoke, Nurudeen A.; Ajadi, Jimoh Olawale; Mukherjee, Amitava; Abbasi, Saddam Akber ( Elsevier , 2022 , Article)Parametric and nonparametric multivariate control charts that are proven very useful in monitoring the covariance matrix of multivariate normally or “nearly” normally distributed continuous datasets have been proposed in ...