The X̄ control chart under non-normality

The X Control Chart under Non-Normality

This paper studies design schemes for the X control chart under non-normality. Different estimators of the standard deviation are considered and the effect of the estimator on the performance of the control chart under non-normality is investigated. Two situations are distinguished. In the first situation, the effect of non-normality on the X control chart is investigated by using the control l...

The Individuals Control Chart in Case of Non-Normality

Robustness of R-Chart to Non Normality

Communications in Statistics Simulation and Computation Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713597237 Robustness of R-Chart to Non Normality Shih-Chou Kao a; Chuanching Ho b a Institute of Operation and Management, Kao Yuan University, Taiwan, R.O.C. b Chung-Shan Institute of Science and Technology...

The Robustness of the Three-Way Chart to Non Normality

I received an IUSB Faculty Research Grant $2,176 for project " The Robustness of the Three-Way Chart to Non-normality " in April 2004. I purchased a new PC in May for about $1,800, and spent $150 for a one-year local license of MatLab software for the PC. The new PC with fast processor and large memory capability allowed me to run some large calculations for the stated project. Orleans regularl...

Robustness of the EWMA Control Chart to Non-normality for Autocorrelated Processes

Most commonly used control charts for monitoring quality characteristics of the processes were developed under the assumption that the observations are randomly sampled from a normal population. It is well known that these control charts have more false alarms than usual when processes are positively autocorrelated. One remedy is to adjust the control limits such that the modified control chart...