Simulation-based design for infrastructure system simulation

Simulation models are often used to analyze the behavior and performance of infrastructure systems. The use of simulation models in multi-actor design processes is restricted to the analysis phase after conceptual designs have been completed. To use simulation models throughout the design process, simulation environments need to be adapted to support the interactive and iterative nature of design processes, making the shift from a `hard' to a `soft' systems perspective. By using the Discrete Event Systems specification, modular and hierarchical component libraries can be constructed that can be used in participatory design processes. In this paper, we present our experiences on developing and using simulation environments in design processes for container terminals and rail systems. We present the cases, the architecture of the design environments and the use of them in actual design processes. Hereafter, we will discuss the enhancement we are studying to support the multiple perspectives present in multi-actor environment