blanket order; bulk order; consolidated order
Business term for placing a single order that covers multiple items or a long-term supply, often to reduce costs or simplify procurement.
We reduce costs by placing a blanket order for consumables.
We plan to place a consolidated order for next year's supplies.
一括購入 means bulk purchasing (buying many items at once), while 一括発注 focuses on the ordering process itself, often implying a long-term contract or single order covering multiple deliveries.
大量発注 emphasizes ordering a large quantity, whereas 一括発注 stresses the consolidation of multiple items or requirements into one order, regardless of quantity.
Compound of 一括 (いっかつ, 'lumping together') and 発注 (はっちゅう, 'ordering'). The term is a modern business expression.