Book excerpt: Traditionally, Lean and Six Sigma methods were used in Automobile and Manufacturing Industries. This book is an attempt to put lights on the Lean and Six Sigma methods and its utilization. Lean Methods are a known effort for reducing the wastes from a process. Whereas Six Sigma is a business philosophy that mainly focuses on Continuous Improvements. Lean and Six Sigma both are set of tools and strategies that help in improving the processes. Though the Lean and Six Sigma methods were developed to support Improvement Projects in Manufacturing industry, the IT and ITES too are successfully enabling Lean Six Sigma to achieve optimum benefits.