The basic principle on which Carton Flow works is FIFO or First In First Out.
Here, once an item is unloaded from the front, the next in line item moves ahead and takes its place.
An advantage of this system over the conventional static shelfing system is that the merchandise remains better organised and is easy to locate and pick as well. Also, the warehouse inventory is easier to monitor and control for accounting purposes. A significant advantage of this method is that it offers up to 75% savings in labour.