实现构件软件可靠性分析的改进的可加模型

摘要

With respect to component software reliability analysis, additive models are the first attempt to build the NHPP model of a component software application. However, additive models do not employ a white-box approach to analyze the application architecture. And they assume NHPP models of all components to be available regardless of how to build them according to component software testing process. In this paper, the above two problems of additive models are solved.Simulation is adopted to realize the mapping from testing profile to operational profile of components in order to build their NHPP models. And then, a state-based white box approach is used to integrate all the NHPP models of components to create the NHPP model of a component software application. Our model includes the benefits of both black box and white box approaches. The evaluation experiment showed the effectiveness of our model.%可加模型是构件软件可靠性分析领域中的创新式尝试,建立了构件软件应用的非齐次泊松过程(NHPP)类模型.但是可加模型中没有采用白盒方法分析构件软件应用的体系结构,并且它假设构件的NHPP模型已知,而不考虑如何根据构件软件的实际测试过程来建立构件的NHPP模型.本文针对可加模型存在的问题进行改进.利用仿真方法实现构件测试剖面到运行剖面的映射,建立构件的NHPP模型.然后通过基于状态的白盒分析方法将所有构件的NHPP模型结合起来,建立整个应用的NHPP模型.改进后的可加模型实现了黑盒方法和白盒方法的结合.最后通过一个实验验证了改进后的可加模型的有效性.