A Review of Research on Testability Technology for Complex Systems

Testability technology, an important design feature for easy testing and diagnosis, has a great impact on the availability of systems and equipment. Good testability equipment can improve the reliability and safety of equipment in time when facing failure or unexpected situations; it can quickly detect and isolate the failure during maintenance, shorten the time of failure detection and maintenance, and effectively reduce the maintenance cost. When studying the testability of complex systems, it is necessary to proceed sequentially from five aspects: testability hierarchy, failure mode sorting, test set selection, fault diagnosis, and testability verification. This paper briefly introduces these key technology their core concepts as well as their common methods.