in quality control charts, the problem of determining the optimum process mean arises when the deviation of a quality characteristic in one direction is more harmful than in the opposite direction. the failure mode in these two directions is usually different. a great majority of researches in this area have considered asymmet-ric cost function for processes with single quality characteristics....

We describe our implementation of the multivariate Matérn model for spatial datasets, using Vecchia’s approximation and a Fisher scoring optimization algorithm. consider various pararameterizations that have been proposed in literature ensuring validity, as well an unconstrained model. A strength study is code tested on many real-world datasets. use it to effect ordering conditioning restrictio...