Race-free scenarios of message sequence charts

Message Sequence Charts (MSCs) are a graphical language for description of scenarios in terms of message exchanges between communicating components in a distributed environment. The language is popular in capturing system requirements in the design of reactive systems and communication protocols. In this paper, we review a design anomaly, called race conditions, in an MSC specification and present a few drawbacks with the current solution. We propose a new approach to correcting race conditions, and the limitation of this approach is also discussed.