Barcode number generation

Dear Experts,

Please guide me how to create Barcode on the completion of Final inspection.

Steps :

01. Product is ready for Final Inspection

02. Perform Final Inspection

03. On completion of Final Inspection, Barcode no. is generated.The information of Barcode is Finish material no. & Quanity

04. Product is then sent to warehouse.

Regards,

Gyan