Six Sigma uses statistical and numeric methods to reduce the number of defects in output to an insignificant level. It focus on understanding customer’s requirement better and eliminating waste and defects. The objectives is to improve the organization’s products, services, processes across production marketing and finance. The method integrates knowledge of statistics ,engineering, process and project management. It includes the phases like define, measure, analyze, improve and control .The project manager should include six sigma method to scope, time, cost , quality . It helps to understand clear definition of requirements, better scheduling, risk management, resources management, cost control, careful selection of standards and realistic assessment of capabilities, immovable deadlines. Six Sigma method focus on measurable and quantifiable financial returns where leadership plays a critical role and decision are made on the basis of data and statistics nit on assumptions.