A grey box testing method for availability simulation software based on event tree model

Simulation system with random factors presents new challenges to the software testing. The random factors in availability simulation system bring the uncertain running path and it is difficult for the test personnel to construct the expected output of the program. In view of this situation, this paper proposes a grey box testing method for availability simulation software based on event tree model. Event tree model is very much in line with the modeling of discrete event simulation, and the grey box testing method effectively combines elements of black box testing and white box testing. We next build the process-level event tree models according to the features of availability simulation and then, the process of method and related standards are explored. Finally, a case analysis is presented to prove the superiority of the method.