Demonstration of a Six Sigma Tolerance Analysis study performed in @RISK (risk analysis software using Monte Carlo simulation) from Palisade. See http://www.palisade.com/industry/SixSigmaModels.asp#gearpump for a description of the model and to download the example spreadsheet. Model designed and demonstrated by Franco Anzani of SixSigmaIn (www.sixsigmain.it) and Marco Manara of Casappa S.p.A. (www.casappa.com).