[EN] This paper proposes a new double sampling scheme for c control chart (DS-c), which was designed to improve the performance of c chart or to reduce the inspection cost. The mathematical expression required to do an ...
[EN] In some real situations there is the need of controlling p variables of a multivariate process, where p1 out of these p variables are easy and inexpensive to monitor, while the p(2)=p-p(1) remaining variables are ...