A configuration el is Pareto optimum to C2, if its fitness func-tion is for at least one of the components in Cl better than c2, and is still within the acceptable parameter range. At the end of the ranking scheme, the solutions with rank 0 are the best solu-tions, followed by those with rank 1, and so forth. When a fault in the running configuration occurs, the SHEAP goes to the set of ranked scheme, to search for a new usable solution with the lowest possible rank (i.e., the best solution).