Abstract: A modeling and simulation apparatus and method for simulating a complex system includes linking together a plurality of computerized models. The models include at least one process model and one or more of a product model, information model and computer console emulator model. Communication clients for each model are connected to a communication server. The method includes transmitting a message from a communication client of a model to the communication server, the message including a class of information and a unique identifier corresponding to the class of information being transmitted; sorting messages received at the communication server into groups according to unique identifiers; queuing the messages within each group temporally; storing the grouped and queued messages at the communication server; and retrieving the transmitted message from the communication server using a second communication client of a second model.