基于环境的多形态时间需求建模方法

Modeling Software Timing Requirements: An Environment Based Approach

时间需求作为嵌入式系统的关键要素,其重要性越来越突出.但是目前的时间需求存在着多样的环境时间描述与单一的软件时间描述融合问题.文中在基于环境的功能性需求的基础上,提出基于环境的多形态时间需求建模方法,试图在需求层次上为该问题提供解决方案.文中构建了支持这个方法的多形态时间需求模型,在环境因素的基础上增加了多形态时间描述,并提出该需求模型制导的需求建模过程,帮助需求分析员在功能性需求的基础上建模时间需求.文中还给出了从多样的环境时间描述得到软件时间需求规约的步骤,指导需求分析人员抽取时间需求规约.

Timing requirement as a key element in the embedded systems is becoming more and more important. However, at present, there is an integration problem between multiple environment time description and single software time description in timing requirements. On the basis of the environment based functional requirements, this paper proposes a multiform time require ments modeling approach trying to provide a solution to the integration problem at the require- ment level. A multiform time requirement model is built by adding multiform time description to environment elements for supporting this approach. A timing requirements modeling process guided by the requirement model is also presented for helping timing requirements description on the basis of functional requirements. Steps from timing requirements to timing requirement specification are also given. Following these steps, requirements analysts can obtain the timing requirements specification easily.