Rich Charron & H. James Harrington 
The Lean Six Sigma Black Belt Handbook [PDF ebook] 
Tools and Methods for Process Acceleration

Although Lean and Six Sigma appear to be quite different, when used together they have shown to deliver unprecedented improvements to quality and profitability. The Lean Six Sigma Black Belt Handbook: Tools and Methods for Process Acceleration explains how to integrate these seemingly dissimilar approaches to increase production speed while decreas