关键词: 构件软件, 软件可靠性, 基于架构的模型, 操作剖面

Abstract: Architecture-based software reliability analysis typically takes the reliability of component as an invariable property of component itself，while disregards the fact that it is changed when the component context that it interacts with is changed due to a different operational profile of the system.This paper aims at architecture-based software reliability model which is one type of approach modeling component-based software，introduces an input profile matrix of transition destination component to build a relationship between operational profile and the component reliability，and provides an improved composite algorithm to solve the model.The application analysis of a case study indicates that this model is able to fully capture the impact of different operational profiles on the system reliability in aspects of both model parameters，transition probability and component reliability.This ability will benefit reliability analysis of higher accuracy at the stage of system design.

Key words: component-based software, software reliability, architecture-based model, operational profile