Six Sigma - Growing article, with links to many related topics. [Wikipedia] - http://en.wikipedia.org/wiki/Six_Sigma
iSixSigma LLC: Software - Resources for software and information technology quality. Usual results for software development Six Sigma programs: benefits exceed breakeven 6-12 months from start, 15-25% drop in costs in year 2, continuing drops thereafter. - http://software.isixsigma.com/