line function

(management) Any primary business function that would affect customers or profits if interrupted

Japanese Meaning

中核業務機能：顧客や利益に影響を及ぼす主要なビジネス機能

If the line function responsible for order fulfillment goes down, customers will notice delays and revenue will drop.

受注処理を担当する主要な事業機能が停止すると、顧客は遅延に気づき、収益が減少します。

Sense（1）

(management) Any primary business function that would affect customers or profits if interrupted

line functions

（ plural ）