A unique number assigned for identification to a single piece that will never be repeated for similar pieces. Serial numbers are usually applied by the manufacturer but can be applied at other points by the distributor or wholesaler. Serial numbers can be used to support traceability and warranty programs.

Inventory Counting 101: Your Simple Guide to Better Stock Management
Running an ecommerce business? Then you know inventory is everything. But here’s the question: do you actually know how much inventory you have right now? Many business owners think as long as they have enough products to sell, the exact count doesn’t matter. That’s a costly mistake. Accurate inventory counts