The following are the major reasons why MS employs model in general and mathematical models in particular:
a) Models enable the compression of time.
b) Manipulating the model is much easier than manipulating the real system.
c) The cost of making mistakes during a trial-and-error experiment is much smaller when done on the model.
d) The cost of modeling analysis is much lower than if a similar experiment were conducted with the real system.
e) Models enhance and reinforce learning.
f) The use of mathematical models enables quick identification and analysis of a very large number of possible solutions.