An overview of hierarchical control flow graph models

Hierarchical control flow graph models define a modeling paradigm for discrete event simulation modeling based upon hierarchical extensions to control flow graph models. Conceptually, models consist of a set of independent, encapsulated, concurrently operating model components where each component has its own thread of control and the components interact with each other solely via message passing. Two primary objectives for hierarchical control flow graph models are: (1) to facilitate model development by making it easier to develop, maintain, and reuse models and model elements and (2) to support the flexible and efficient execution of models. Hierarchical control flow graph models use two complementary types of hierarchical model specification structures, one to specify components and interconnections and the other to specify component behaviors