The company integrates PDCA into the enterprise culture, reducing the error and leak caused by the personal subjective factors to reach the constant development of the enterprise. The constant improvement of PDCA circulation method security system could ensure the perfect management and smooth development of the enterprise. Following PDCA, the staff would develop the habit to comply with regulation. Thus the enterprise would adapt to the market competition, and be stronger in the future.
   Four phases of PDCA
   •P (Plan): from the nomination of question to action plan
   •D(DO): implement the action plan
   •C(CHECK): evaluate the achievement
   •A(ACT): standardization, and further promotion

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