Amass Manufacturing Co.,Litimed.

Quality control mainly adopts:

Checklist
In the middle of the production process, check to ensure that the size of the product's parts does not appear to be problematic

Assemble after the production is completed to ensure that the cooperation of the product itself and the core function of the entire product are qualified.
Check the details again.

Due to the difference in core functions of each product, the list will be different.