ABSTRACT
Modeling and simulation (M&S) projects vary widely according to the nature of what is represented, the simulation paradigm employed, the modeling purpose, and the size of the modeling effort. Therefore, modeling processes and methodologies employed can be very different across projects. Simulation is used to represent the behavior of systems, processes, or scenarios. A system view is concerned with inputs to a system boundary, their transformation, and outputs across the system boundary. A process view is concerned with a series of steps, each step having inputs, performing a transformation, and producing an output. Scenarios in the context of training or gaming describe an environment with situational factors and actions performed. This chapter discusses the basis for a disciplined approach which is the sequence of modeling stages with the caveat that modeling is not a strictly sequential process of engagement, specification, construction, verification and validation, experimentation, and reporting. Rather, a modeler undertakes these stages iteratively.
