Defining the goal of Lean Six Sigma in 4 sentences :  Identify and understand the true value that the customer needs from a product of service and optimize the efficiency and effectiveness of the processes needed to produce that product or service. The optimization is achieved by reducing or eliminating waste in each process and creating steady flow and flexibility of production.  Production of product or service should match customer demand.  Reduce variation in the outputs of each process so that the products and services are free of defects and consistently satisfy the requirements of the customer.