Browsing by Author "Shongwe, Sandile C."
Now showing items 1-2 of 2
-
Monitoring non-parametric profiles using adaptive EWMA control chart
Abbasi, Saddam Akber; Yeganeh, Ali; Shongwe, Sandile C. ( Nature Research , 2022 , Article)To monitor the quality of a process in statistical process control (SPC), considering a functional relationship between a dependent variable and one or more independent variables (which is denoted as profile monitoring) ... -
Robust Distribution-Free Hybrid Exponentially Weighted Moving Average Schemes Based on Simple Random Sampling and Ranked Set Sampling Techniques
Malela-Majika, Jean Claude; Shongwe, Sandile C.; Aslam, Muhammad; Abbasi, Saddam A. ( Hindawi , 2021 , Article)This paper proposes new nonparametric hybrid exponentially weighted moving average (HEWMA) control charts based on simple random sampling (SRS) and ranked set sampling (RSS) techniques using the Wilcoxon rank-sum W statistic. ...