available to promise; ATP
Business term used in inventory management and order fulfillment, indicating that a product is in stock and can be committed to a buyer. Often abbreviated as ATP.
After confirming the available-to-promise status, we will send the official purchase order.
This product is available to promise, so we can deliver it as soon as possible.
在庫 refers to physical inventory on hand, while 納期回答 is a commitment to deliver from that inventory or planned production.
納期 is the delivery date or deadline, whereas 納期回答 is the promise that the item can be delivered by that date.
Compound of 納期 (delivery date) and 回答 (reply, answer), literally 'delivery date answer'. The specialized meaning 'available to promise' is a direct translation of the English business term.