Fault-simulation methods — extensions and comparison

In this paper, we compare four different methods of fault simulation in terms of their handling of arbitrary numbers of logic values, modeling levels, and detailed timing. The methods considered are parallel, deductive, multilist, and concurrent simulation methods. Since some of the methods, in their current forms, are unable to handle all the problems under consideration, we have proposed extensions to the methods wherever necessary before making the comparisons. While all the methods considered are capable of solving the problems with the same degree of accuracy, the concurrent simulation method appears to be the simplest and most flexible.