Usually, two different EWMA charts are used to screen the mechanism average and dispersion. Chen and Xie 2001 was the first to introduce the idea to screen both mean and variance simultaneously, with a single statistic ...

With the passage of time and global development in the industrial world, the competition for the quality improvement of the manufactured product has also increased. To achieve the quality perfection goal the best utilized ...

This study aims to specify the extension of Hansen-Hurwitz (1946). This research proposes two sub-sampling methodology based on three-phase sampling and four-phase sampling for dealing with the problem of non-response. The ...