摘要
软件维护中的波动效应现象是导致其维护费用上升的一个重要原因。SDL是CCITT推荐的用于描述软件功能和行为规范的国际标准语言,并已广泛应用于程控交换领域。本文首先将SDL中的波动效应划分为两类,即功能波动效应和行为波动效应,并形式地定义出SDL中的基本数据流关系。然后,建立一个功能波动效应的计算模型。
The ripple effect in software maintenance is one of the important factor making maintenance cost expensive. SDL recommended by CCITT is an international standard language with which software function and behaviour can be specified and which has been widely used in the field of SPC switching systems. In this paper, the ripple effect in SDL is classified into functional ripple effect and behavioural one,and basic data flow relationship of SDL is formally defined. Furthermore, a model is set for calculating functional ripple effect of SDL.
出处
《通信学报》
EI
CSCD
北大核心
1990年第5期29-33,6,共6页
Journal on Communications
