Abstract: Based on Copula function，this paper analyzes the reliability of software architecture with dependent components.After offering the models about reliabilities，the average life and the failure rate of the system，this paper discusses the relationship in average life with positive orthant dependence situations，i.e. in dependent and independent systems.Moreover，case studies have been done to analyze the effects of the number of the components as well as the dependence degree among the components on the average life of the software architecture.

摘要： 应用Copula函数，研究了构件相依的软件体系结构可靠性问题，给出了FGM Copula函数下软件系统常规结构的可靠度、平均寿命、失效率的表达式，讨论了构件正象限相关下软件系统的平均寿命与构件独立时系统的平均寿命的关系。通过算例分析了一般软件体系的计算问题以及构件个数与构件相依关系对系统平均寿命的影响。