Diagnostics based on faulty signature

Abstract

A fault diagnostic algorithm which makes use of the information from a faulty signature is presented. The idea is to search the likely fault locations before the tests are performed. The method reduces the number of tests required to diagnose the faults with the probability of error aliasing. Such probability is always smaller than that of error detection in signature analysis. When matching tests are difficult or impossible, the method provides an estimate of where errors that caused the incorrect signature might have occurred.<>