Abstract: A scripting language enables a systems analyst to write one or more scripts to manage the behavior of a simulation model, without having detailed knowledge of the programming language or the software architecture of the simulation model. Script specifications define the simulation procedures that the underlying simulation model expects to be present. Script definitions are prepared to change different purposes or behaviors of the simulation model. The script definitions and script specifications are matched and translated to generate a simulation code sequence. The simulation code sequence is combined with the simulation code representing the underlying simulation model. During the combination, the structure or behavior of the simulation model is manipulated or changed by commands or procedures introduced by the script-based simulation code sequence.