Six sigma is a quantitative approach that fuels improved effectiveness and efficiency in an organization . some of the most successful companies like ge and alliedsignal contributed to making six sigma the most popular quality improvement methodology in history . the essay is focused on : - the concept of six sigma quality management - the application of six sigma quality management on improving service quality management 六西格玛（ 6 ）质量管理体系以数据和事实为依据、以满足和超越客户需求为主旨、以基于对生产和服务流程的持续改进为根本、以提高效率和缩减成本为目标、以全员参与，建立和改善企业质量文化为灵魂。
