Аннотация:The need for increased reliability as well as better and simpler maintenance of wea pon systems and electronic systems gene rally is now being echoed at the highest levels. It is emphasized that interest in this aspect of the problem is not limited to military applications. We have been addressing this problem so as to take maximum advantage of inexpensive simple test equipment and computational facilities. An important criterion is that they be capable of effective use by the level of technicians available for the maintenance of the complex electronic sys tems currently in use and those being deve loped for future ground, ship or airborne use. We are developing a fuzzy automaton learning model based, in part, on the "fuzzy concept" to achieve such fault diag nosis. As a realistic goal, we seek to achieve at least an 80% throughput utili zing streamlined facilities.