Ananyzing the ouput of a simulation model is important. How can we be sure that our output is proper and will not hurt an experiment result using those outputs.

How can we tell our random variables are well made? In simulation terminology, we have something called input analysis.

Random variable can be generated from a good random number generator. If real variables has moved the reality, we could design a future with a good random variables.

A simulation is not real but it can represent the real. It’s because a simulation is an imitation of real situation - it can’t be exact but it can be approximate.