A disclosed method for designing a circuit having multiple conductors includes
selecting first and second circuit operating points corresponding to first and
second circuit applications, respectively. A performance difference between circuit
operation at the first and second circuit operating points is determined and used
to compute a factor. The factor is applied to resistance values of the conductors,
thereby producing modified conductor resistance values. A timing analysis of the
circuit is performed using the modified conductor resistance values. A computer
program product is described including computer program code for carrying out some
or all of the operations of the method. An apparatus for designing the circuit
includes means for applying the factor to the resistance values of the conductors
and for performing the timing analysis of the circuit. A described timing analysis
system includes a memory system and a central processing unit coupled to the memory system.