This course learn about the concept of system, system approach, model, and model development. System concepts: understanding the system, system characteristics, classification. Systems Approach: the principle of a systems approach and systems analysis. Model: the concept of the model, the model definition, model characteristics, classification of models, assumptions and model formulation. Model development: principles of modeling, introduction to computer simulation, modeling in computer simulations, analysis of the data input, verification and analysis of output, parameterization, validation and evaluation.