The forces of Lean and Information Technology are complementary. Moreover, the transformation of any enterprise to a competitive Lean enterprise requires the skillful use of IT throughout the internal value streams and external supply chain. This book uses the lessons learned from 50 years of Lean, which began with the Toyota Production System, along with Six Sigma and Theory of Constraints, to clearly describe a comprehensive framework for how IT can support the continuous improvement of manufacturing and non-manufacturing companies. The author also applies the fundamentals of Lean Manufacturing to the evolution of Lean IT.