Computer simulation is used to reduce the risk associated with creating new systems or with making
changes to existing ones. More than ever, modern organizations want assurance that investments will
produce the expected results. For instance, an assembly line may be required to produce a particular
number of autos during an eight hour shift. Complex, interacting factors influence operation and so
powerful tools are needed to develop an accurate analysis. Over the past few decades, computer
simulation software, together with statistical analysis techniques have evolved to give decision makers
tools equal to the task. As the world grows more technical and the need for precision becomes more
important, the margin for error will continue to shrink. Business, industry, and governments cannot afford
to make educated guesses during systems development. For that reason, computer simulation is more
important than ever.