Business Process Simulation (BPS) is based on linking a graph-based model to a Discrete Event Simulation (DES) that simulates its behaviour over time. There exists a variety of software packages implementing BPS (e.g. Rücker 2008, Dodds 2005), plus some DES packages that provide a “flowchart” like approach by means of a server/client based model (Sadowski and Bapat 2001, Nordgren 2001, Nordgren 2003, Concannon et al. 2003).