Software testing method based on PRA (probabilistic risk assessment)

The invention discloses a software testing method based on PRA (probabilistic risk assessment). The method comprises steps as follows: S1, a PRA scene is recognized; S2, characteristics of an operation profile are described; S3, a sample is generated from the operation profile; S4, a physical simulation model of a system is established; S5, a test case is produced by the physical simulation model; S6, a test is executed. The PRA method is adopted for analyzing the system, on this basis, characteristic description of the system operation profile is obtained, the sample is generated through random sampling, the test case containing probabilistic characteristics is produced, and whether a system software function meets desired requirements after risk accidents happen is tested to the greatest extent. The software operation profile can be constructed completely and accurately and can be further used for software reliability evaluation based on risk informing. 本发明公开种基于概率风险评价的软件测试方法，包括以下步骤：S1、概率风险评价场景识别；S2、运行剖面特征描述