@RISK is a risk analysis add-in for MS Excel. @RISK uses Monte Carlo simulation to allow you to take all possible outcomes into account. Replace uncertain values in your spreadsheet with @RISK functions to represent a range of possible values. Select bottom-line cells as outputs, and start a simulation. @RISK recalculates your spreadsheet thousands of times, selecting random numbers from the @RISK functions you entered. The result: distributions of possible outcomes and the probabilities of getting those results! With @RISK, you can answer questions like "What is the probability of earning profits over $500,000?"