The major target of "Six Sigma" is to achieve the occurrence of deficiencies ,just ゛３．４゛out of one million units of normal product in statistics, an extremely small scattering in uniformity.

　The " Six Sigma of Japanese Version " defines its Six-Sigma activities as follows:
　Entire organizational activities to solve problems to minimize ゛the unwanted cost resulted from quality deficiencies゛(COPQ :Cost Of Poor Quality) as close as possible to nil, by　realizing the management's major objectives（SSP：Six Sigma Project)eatablished　by means of accurate grasping the customers'needs（VOC：Voice of Customer) ゛as well as“ the strengths and weaknesses of competitors”, and focusing on゛internal factors that are related to the quality deficiency゛（CTQ：Critical To Quality)．