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, Pmethod [5]. These strategies reduce the extraction complexity usu-ally to order linear in the number of source objects in the system. Conceptually this complexity reduction is made possible by repre-senting the collective couplings/interactions between groups of tion. This modeling approach is the circuit equivalent to the accu-mulation and distribution processes seen in the fast potential eval-uation methods employed in parasitic extractors. The sparse RLC circuit models are generated directly from the hierarchical extrac-tion results (such as in [2] or [3]) rather than creating, then reduc-ing a large, flattened RLC circuit