Crystal Ball: Most models view inputs as static numbers. Crystal Ball is an MS Excel add-on that allows the analyst/user to view recognize and quantify inputs as stochastic variables, i.e. having a probability distribution rather than being static. This provides the user an output with a probability distribution best quantifying and demonstrating risk. These slides are an overview of Crystal Ball, the MS Excel add-on.
Simulation: How a simulation is developed, run, and analyzed is important. These slides introduce the correct methodology(ies) when using Crystal Ball.