Pre-production Inspection Initial Production Inspection (IPI) is a comprehensive inspection and evaluation of the raw materials and components to be put into production. The purpose is to disclose the items found in the inspection that do not meet the product requirements in the form of reports and improve them in time.

Production Inspection During Production Inspection (DPI) is a quality assessment of semi-finished and finished products when the production is completed 20% to 30%. The inspector will check the quality of the semi-finished and finished products according to the productspecifications, evaluation methods, quantity of goods, delivery time and other factors given by the customer, and then issue a report.