Backorder

A customer order that cannot be fulfilled immediately because the item is temporarily unavailable.

Examples

01A distributor's order for 50 pumps becomes a backorder of 20 units because only 30 are in stock.
02Customer service reviews every backorder older than 5 days in the daily call, with the expected ship date.
03When backorders on one product family pass 200 units, planning adds an extra shift for two weeks to clear them.