Michael Khoo Boon ChongUniversity of Science Malaysia | USM · School of Mathematical Sciences
Michael Khoo Boon Chong
PhD
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Publications (411)
Abstrak Carta S sering digunakan untuk mengawal anjakan dalam varians proses di industri. Carta S berbeza daripada carta R oleh sebab carta S adalah berdasarkan sisihan piawai sampel manakala carta R melibatkan julat sampel. Carta S lazimnya digunakan apabila saiz sampel, n > 10. Carta S kurang peka terhadap pengesanan an- jakan varians yang kecil....
This paper compares three different types of control charting methods used in the monitoring of a process mean from a skewed distribution. The skewed distributions considered are the Weibull, lognormal and gamma distributions while the control charts for skewed distributions studied are the weighted variance ¯ X chart
Unlike a Shewhart chart, the exponentially weighted moving average (EWMA) and cumulative sum (CUSUM) charts are memory control charts (also known as time weighted control charts) that are used for a quick detection of small shifts in the process mean. Control charts that combine information from present and past samples, like the EWMA and CUSUM cha...
