Real-time systems are complex to design and implement. Various modelling and simulation techniques are employed to make this task more structured and efficient. However, there is often a disconnect between modeling for simulation and development for deployment. In this paper we discuss a technique to bridge this gap between simulation and deployment, specifically dealing with a framework to handle asynchronous inputs into a system developed using the Discrete Event System Specification. Further, this paper presents a case study that demonstrates the effectiveness of the framework, and the congruence between simulation and deployment of a real-time system is determined.