This book represents an innovative approach to implement Lean Six sigma and quality engineering tools in computer companies. The author of this book has constructed a robust framework to measure and analyse the performance of computer companies. By highlighting the root causes of imperfection, The Company can easily improve their performances. By reviewing the Literature, the author has found out there have not been enough studies conducted in that field. That motivates the author to write this book. To explore the effectiveness of the current framework, a computer service company has been selected, and enormous impact on process improvement has been achieved.