shared service

Etymology
Attributed to Greg Hackett of The Hackett Group.

Noun

 * 1)  An internal business organization providing support services that are shared between multiple business units or functions.
 * 2)  A virtual or physical team whose process expertise is shared across multiple business units or functions (rather than duplicating staff in each business unit) to execute business processes, in a consistent manner, for optimal resource efficiency, cost and service performance.