MAST real-time view: A graphic UML tool for modeling object-oriented real-time systems

This paper describes a methodology and a framework for building an analyzable real-time model of an object-oriented system that is developed using a UML CASE tool. The real-time model is formulated by a new UML view named "MAST_RT_View ". This view allows the designer to gradually build the real-time model according to the phase of the development process, to feed data into the analysis tools, and to bring the relevant timing responses back into the model. The MAST_RT_View has three models: the processing capacity of the hardware/ software platform; the timing behavior of the application logical components; and the workload and the timing requirements of each real-time situation to be analyzed. This view is analyzable by the MAST set of tools, which includes worst-case schedulability, analysis and discrete-event simulation for hard and soft timing requirements.