You can apply to the quality department for modification, the application form should state the reason for modification, modify the original information and modify the information, the person in charge of the quality of the approval of the direct modification, the application form needs to be retained in the archives. Production batch number is in industrial production, although the raw materials and processes are the same, but each batch of material production out of the product, in the quality and performance of the difference. In order to track the responsibility of this batch of products, to avoid mixing unclear, so each batch of products have the corresponding batch number. The serial number for a single material, a material a serial number, serial number control range can not be repeated.