In daily work, any work cycle can be divided into four stages: planning, execution, inspection, and summary. Applying this work sequence loop to quality management work is called the PDCA work cycle. There are eight steps in this work cycle, as shown in Figure 1. 
Figure 1 Eight steps of the PDCA cycle
P - In the planning phase, there are four steps:
1) Analyze the status quo and identify the problem;
2) Analyze the cause of the problem;
3) Find out the main reasons;
4) Formulate measures and plan;
D - the implementation phase, there is a step:
5) Implementation measures and implementation plans;
C - inspection phase, there is a step:
6) Check the work and investigate the effect;
A - the processing stage, there are two steps:
7) Standardization and consolidation of results;
8) Legacy issues, transfer to the next issue.
The PDCA cycle has two characteristics: First, the four stages of the PDCA cycle are connected before and after each other, and they are connected to each other. Each cycle does not stop at the original level, but every cycle, the quality is improved by one step. , continue to improve, see Figure 2; the second is a large cycle of small loops, interconnected, and advance together, see Figure 3 below.
Figure 2 cyclic scrolling
Figure 3 big ring set ring
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