Modelling real time systems functional requirements using existing data flow methods

This report summarises the data flow models from existing real time systems development methodologies, and describes some of the problems with using them to define real-time system functional requirements. The motivation for this report is to establish a suitable model for prototyping real-time systems. A vending machine case study is used to model various system properties, and Z was used to describe the functional properties. The report shows that there is a case for a new data flow model to define system requirements.