order volume; orders received
Business term referring to the total monetary value of orders received, often used in financial reports and corporate announcements.
This term's order volume increased by 20% compared to the previous year.
The orders received hit a record high.
売上高 is sales revenue (money earned from completed sales), whereas 受注額 is the value of orders received, which may not yet be realized as sales.
Compound of 受注 (order receipt) + 額 (amount).