25. The system of claim 22 , wherein the set of functional units includes at least one unit configured to identify a degradation condition for the at least one tool in the set of tools.
25. The system of claim 22 , wherein the set of functional units includes at least one unit configured to identify a degradation condition for the at least one tool in the set of tools. 27. The system of claim 25 , wherein the degradation condition includes a numeric value, the numeric value assesses a distance amongst two vectors of N tuples, wherein the N tuples are computed metrics of observed data and N is a positive integer.