Process improvement Enterprises are trapped in the dilemma of excessive quality. Under the cost pressure, it is urgent to the quality bottom line.stick toadhere tostick to Enterprises are trapped in the dilemma of excessive quality. Under the cost pressure, it is urgent to stick to the quality bottom line. This article focuses on the problem of excessive quality faced by enterprises. Taking a small and medium - sized foreign - invested enterprise as an example... Raw material controlLean production concept