VisSim/Discrete Event is a process-oriented, discrete event modeling toolkit based on the powerful and proven graphical interface provided by the underlying VisSim simulation environment. Analysts can use this toolkit to construct models of many different kinds of systems. Each model has one or more task graphs and a set of simulated resources. The task graphs specify the sequence of actions which characterize the behavior of entities in the real system. The comprehensive collection of task action blocks and simulated resources mean that many kinds of systems can be modeled