Research on System Testability Index Determination Method

The first step of design for testability(DFT) is to determine the testability index.Due to the lack of detailed information of the system in the concept phase of development,an index eclectic quotiety method is introduced to resolve the problem.Considering the user's testability requirement and the testability level that the contractor could achieve,the method analyzes various factors which influence the system testability,applies the analytic hierarchy process to work out the testability level that the contractor can achieve,and uses the eclectic quotiety to determine the testability index.Finally, the effectiveness of the proposed method is illustrated.