ABSTRACT
Simulation models describe how a system operates, and are used to determine changes resulting from a specific course of action. The classical simulation procedure involves decomposition of the problem in order to aid the system description. The system dynamics simulation approach relies on understanding complex interrelationships existing between different elements within a system, by developing a model that can simulate and quantify the behaviour of the system. Simulation models can be easily and quickly developed using this type of software tool. Such models are easy to modify, easy to understand, and present results clearly to a wide audience of users. Causal loop diagrams are very useful in many situations. They are well suited to representing interdependencies and feedback processes. They can be used effectively at the start of any modelling project to capture mental models. System dynamics simulation and the computer tools for its implementation use a particular diagramming notation for stocks and flows.
