Defect Density Prediction with Six Sigma

Can we predict defect density in advance for softwa re that’s going into production? – The answer is “yes”, if you apply statistical methods t o requirements and run measurement programs for functional size and defect cost. The S ix Sigma toolbox provides statistical methods for building such prediction models. This paper explains the basics of these statistical methods without going into the details of Design for Six Sigma (DfSS) and Quality Function De ployment (QFD).