Nowadays, it is very essential to learn various skills and practices of Six Sigma for improvement of business processes.  It basically helps a company in enhancing performance by establishing the employees and management strategies. The main focus of Six Sigma is to identify defects or errors in business, remove these errors and decrease variation in manufacturing as well as business processes. During six sigma projects there are mainly two project methodologies that a company usually follows.  They are DMAIC and DMADV. Both consist of five phases; however, DMAIC is implemented on projects that focus on improvement of the existing process of business, whereas DMADV is implemented on projects which aim to develop new product and process designs. To understand the importance of Six Sigma in business processes, please follow this link: http://goarticles.com/article/Six-Sigma-Benefits-for-Businesses/6646247/