15. The method of claim 14 , wherein said model comprises a joint probability density of occurrence of constellations of parameter values during said normal process behavior.
15. The method of claim 14 , wherein said model comprises a joint probability density of occurrence of constellations of parameter values during said normal process behavior. 16. The method of claim 15 , wherein said model specifies regions of parameter values in accordance with said probability density of occurrence, each of said regions being associated with a respective process status.