NetSuite allow Overage functionality is useful for the customers who receive stock in excess from suppliers regularly. This feature allows the users to accept more number of items than defined in the purchase order. By enabling this feature NetSuite allows users to accept more number of items than defined in the purchase order.
Purchase order with one inventory item
Item Receipt for same purchase order with quantity 2.
With the above feature enabled, NetSuite gives the provision to change the quantity of the item in the item receipt