Quality circle, also called quality control circle (QCC for short), is a small group composed of people in the same, similar or complementary workplaces (also called QC group, usually about 6 people), and then all the people cooperate and brainstorm, and according to certain activity procedures, seven methods (QC777 method) are used to solve problems in the workplace, management and culture. This is a vivid form of quality control.

The quality control circle is characterized by participants' emphasis on the combination of leaders, technicians and employees. The contents and objectives of modern QCC management have broken through the original scope of quality management and expanded to a higher technology, technology and management direction.

TPM is the abbreviation of Total Productive Maintenance in English and translated into total production maintenance and total production maintenance in Chinese.

It is an equipment maintenance management system with the goal of improving the comprehensive efficiency of equipment, taking the preventive maintenance of the whole system as the process and based on the participation of all staff.