Robust testing a subset of paths - untested paths in the circuit

In this paper we analyze the coverage of distributed delay defects, on untested but functionally sensitizable paths, achieved by robustly testing a subset of paths in the circuit. This is measured by translating the information gained from robust testing into a set of linear constraints on edge delays and then using these to bound the circuit delay. Surprisingly, the results of our experiments on ISCAS benchmark circuits show that robust testing of a subset of paths in the circuit, may not cover distributed delay defects on the remaining paths very well at all.