Six sigma is a well- liked and powerful statistical tools and techniques to drive out variability in the efficiency o f processes within the organisation. First introduced by Motorola in 1986 as a quality performance measurement, six sigma now has been developed into a statistically guided technique used to improve procedure and product quality. Many organizations have informed momentous profits due to adaptation o f six sigma project, though not all has success tales. Reports state that 60% six sigma projects either fails or profits doesn't last more than a year. Studies show that six sigma technique works under some conditions. This paper reviews the literatures associated with the factors that lead to sustainable and successful six sigma in the organization.