A multivariate extension of the exponentially weighted moving average (EWMA) control chart is presented, and guidelines given for designing this easy-to-implement multivariate procedure. A comparison ...

A quality control chart is a graphic that depicts whether sampled products or processes are meeting their intended specifications.

The research may yield birth control that men could take just before sex, a new paradigm in the decades-long quest to develop better male contraceptives.

In many aerospace production processes, however, it requires that quality control measures be in place from the time that the first unit of product is produced. Certain types of control charts for ...