Production Monintoring and In-line Inspection refers to the supervision of the production process, following up on production progress, and conducting product quality inspections on various processes of the product during the production process, including the inspection of finished and semi-finished products. The purpose is to timely identify and correct problems at each stage of production, thereby ensuring that the quality of the final product meets the requirements. Unlike final product inspection, inline inspection is conducted continuously during the production process, including inspection of finished products and inspection of semi-finished products, involving various production processes and stages where problems may occur. It can be dealt with immediately when problems occur to avoid producing a large number of unqualified products.