The company controls the raw materials through a series of supply quality management measures such as procurement activity control, incoming material inspection and supplier management. In order to ensure that the products meet the requirements of customers, the factory products are fully inspected according to the corresponding standards. Since product quality is greatly affected by subjective and objective factors, in order to maximize the quality of the company's products, quality inspectors must be familiar with the company's quality inspection standards and strictly follow the quality inspection procedures to avoid product inspection errors.