Six sigma theory has been widely valued by many industries in the world and also in China, since its application has brought great changes to many world famous companies like GE, Motorola, etc.

• 六西格玛理论的实践给GE,摩托罗拉等世界著名公司带来了巨大经济效益,其重要性已引起包括我国在内许多行业的广泛重视。