The products are commonly measured by two types of quality characteristics. The variable
characteristics measure the numerical scale. Meanwhile, the attribute characteristics …

Along with the development of information and technology, the quality characteristics of a
product cannot be monitored separately in the different types of control charts. In the past …

A multivariate exponentially weighted moving average (MEWMA) and Hotelling's T2 control
charts are types of multivariate control charts for monitoring the mean vector. In this paper …

The average control chart monitors the shifts in the process. The familiar multivariate control
charts are used to detect the mean vector of the process such as multivariate cumulative …

Control charts are the main tools in the statistical process monitoring area to investigate how
the quality of production remains stable or changes over the time. This article develops …

This study investigates whether the level of income influences body mass index and blood
pressure and we also determine whether there is a positive or negative correlation between …

This research aimed to modify the traditional multivariate control charts by using the
multivariate spatial signed rank under the normal distribution, the t distribution, and the …

Copulas are used to model multivariate distribution with continuous margins and
dependence observations. This paper proposes four types of copulas on the multivariate …