simulation
simulation is next best thing to observing a real system in operation. it allows us to collect pertinent information about the behavior of the system by executing a computerized model. The collected data are then used to design the system. Simulation is not an optimization teachnique. Rather, it is a technique for estimating the measures of performance of the modeled system.
Simulation has been used in all aspects of science and technology as the following partial list demonstrates:
1. Basic science
(a) Estimation of the area under a curve or, more generally, evaluation of multiple integrals