Variable parameters (VP) schemes are the most effective adaptive schemes in increasing control charts' sensitivity to detect small to moderate shift sizes. In this paper, we develop four VP adaptive ...

With the development of the modern global market, the product's quality has been one of the key factors that greatly influence the competitiveness of enterprises. In the whole formation of the product ...

In many industrial applications, the output of a process characterized by p variables that are measured simultaneously. Independent variables can be charted individually, but if the variables are ...