Band faults: Efficient approximations to fault bands for the simulation before fault diagnosis of linear circuits

"Band faults," the approximate movements of nominal worstcase boundaries with catastropic faults, are much more efficiently computed than the "fault bands" that they approximate. Derived from a simulation before test, band faults can be used to create a fault dictionary that is supposed to isolate single element catastrophic faults. By no means general, the approach when applied to several example linear circuits nonetheless has yielded promising results.