Its use in the warehouse
FEFO is used for perishable products or products with a use-by date: food, beverages, cosmetics and chemicals. It reduces expiration losses because the lot closest to expiration always ships before a newer one. It requires recording the expiration date of each lot at receiving; without that data, the system cannot order the lots.
How Chainlink WMS applies it
In Chainlink WMS, when an outbound document is released, the system allocates to each line the lot that expires first, excluding stock in quarantine, blocked or damaged. On the handheld, the picker sees the allocated lot. With the strict FEFO rule of Professional and Enterprise, the app does not accept any other lot. Essentials applies FEFO as a fixed setting.