Use case modeling for real-time application

The use case driven approach has been widely used in object-oriented development. This paper presents the initial achievement in applying use case models for a real-time oriented system-the Digital Loop Carrier (DLC) system. In this study, we have developed a complete use case model of more than 20 use cases including hundreds of scenarios. During the course, we have encountered several practical issues, and developed initial solution strategies through several iterations of vigorous debates over the use case model development. We have also introduced a few new concepts to ease use case modeling. It is hoped that these solution strategies and new concepts will facilitate the use case model and will reduce the modeling time by minimizing practical confusions