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需求变化传播分析是实施复杂可信软件产品演化的关键。从可信需求和功能需求之间存在相互影响的视角,本文基于需求关系模型建立、需求依赖设计结构矩阵构造、需求变化传播影响度量与需求变化传播影响分析四个层面,提出了一个基于流程的四阶段需求变化传播分析框架模型;给出了功能需求影响关系矩阵、可信需求影响关系矩阵和需求变化传递矩阵的定义,并凭借矩阵运算描述和分析了需求变化传播的具体实现。最后以航空发动机嵌入式监控软件为例说明了模型和方法的应用。
Demand change communication analysis is the key to the evolution of complex and trusted software products. From the perspective of interaction between credible requirements and functional requirements, based on the four aspects of the establishment of demand relationship model, the construction of demand-dependent design structure matrix, the impact measurement of demand change communication and the impact analysis of demand change communication, a flow-based Four-stage demand change communication analysis framework model is given. The definition of functional demand impact relation matrix, credible demand influence relation matrix and demand change transfer matrix are given. The concrete realization of demand change propagation is described and analyzed by matrix operation. Finally, aeroengine embedded monitoring software as an example to illustrate the application of the model and method.