1, p (plan) plan, including the determination of policies and objectives and the formulation of activity plans.

2, D (Do) implementation, according to the known information, design specific methods, schemes and plane layout; Then according to the design and layout, carry out specific operations to realize the contents in the plan.

3, c (check) check and summarize the results of the implementation of the plan, distinguish between right and wrong, clear effect, find out the problem.

4, A (Act) processing, processing the results of the summary inspection, affirming the successful experience and standardizing it; We should also sum up the lessons of failure and pay attention to them. Unresolved problems should be submitted to the next PDCA cycle for solution.