Model conceptualization

The construction of a model of a system is probably as much art as science. The art of modelling is enhanced by ability

$$ To abstract the essential features of a problem $($Event$,$ activities, attributes resources, variables and their relationship$)$

$$ To select and modify basic assumptions that characterize the system

$$ To enrich and elaborate the model until a useful approximation results.

Thus, it is best to start with a simple model and build toward greater complexity. Model conceptualization enhances the quality of the resulting model and increases the confidence of the model user in the application of the model.