System fault behavior model

System fault behavior modeling is a method of building a model around system malfunction. The system fault behavior model describes the occurring process of system malfunction and the behavior after system in fault, and it also presents the effect of basic unit failure on the whole system. After describing the backgrounds and requirements of system fault behavior modeling, the concept and the connotation of system fault behavior were analyzed in detail. The connotation of system fault behavior universal model was further investigated based on these. Then the definition of the model was put forward and the framework of the model was built. The structure of the model was defined as three levels, containing object level, behavior level and restriction level on the basis of the definition and framework of the model. The formalized description of the model based on polychromatic sets theory was also represented. Finally, a simple case was analyzed.