Application of multi-signal modeling theory to testability analysis for complex electronic system

It is important to consider the testability problem for electronic equipment design due to the increased complication of system function and structure. Multi-signal model is akin to overlaying a set of single-signal dependency models on the structural model, which combines advantages of structure model and dependency model. Thus multi-signal modeling method is adopted to describe dependency relationship and calculate testability parameters in this paper. The testability analysis process is illustrated by a practical example of centralized engine room control system. The experimental results indicate that the multi-signal modeling based method is simple, visual and effective for testability analysis of complex electronic system.