Functional management is the most common type of organizational management. The organization is grouped by areas of specialty within different functional areas (e.g., finance, marketing, and engineering). Some refer to a functional area as a “silo.” Communications generally occurs within a single department. If information or project work is needed from another department, a request is transmitted up to the department head, who communicates the request to the other department head. Otherwise, communication stays within the department. Team members complete project work in addition to normal department work.
By the way, when you go to Wikipedia and read about Functional Management, know that I was the creator of the page.