*A model is a physical, mathematical, or logical representation of a system entity, phenomenon, or process.
*A simulation is the implementation of a model over time.
*A simulation brings a model to life and shows how a particular object or phenomenon will behave.
-Useful for testing, analysis or training where real-world systems or concepts can be represented by a model.
*Modeling and simulation (M&S) provides virtual duplication of products and processes
-Represents those products or processes in readily available and operationally valid environments.
*Use of models and simulations can reduce the cost and risk of life cycle activities.
WHY USE MODELING?
*Modeling and simulation have become very important tools across all acquisition-cycle phases and all applications: requirements definition; program management; design and engineering; efficient test planning; result prediction; supplement to actual test and evaluation; manufacturing; and logistics support.
*Four major benefits; cost savings, accelerated schedule, improved product quality and cost avoidance.
M&S is now capable of prototyping full systems, networks, interconnecting multiple systems and their simulators so that simulation technology is moving in every direction conceivable.
CLASSES OF MODELS & SIMULATIONS
*Virtual simulations represent systems both physically and electronically. Examples are:
- Aircraft trainers, the Navy’s Battle Force Tactical Trainer, Close Combat Tactical Trainer, and built-in training.
*Constructive simulations represent a system and its employment. They include:
- Computer models, analytic tools, mockups, IDEF, Flow Diagrams, and Computer-Aided Design/ Manufacturing (CAD/CAM).
* Live simulations are simulated operations with real operators and real equipment. Examples are:
-Fire drills, operational tests, and initial production run with soft tooling.
*Virtual simulations put the human-in-the-loop.
*The operator’s... [continues]
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