"Interagency is a made-up word that is reasonable as an adjective but only a fairy tale as a noun. That will not change until the executive branch of the Federal Government is dramatically reorganized in order to put the inter into the interagency. This reorganization must be done horizontally (to align worldwide departmental and agency regional areas of interest and to integrate regional responsibilities under true interagency leadership within regional interagency directorates) and vertically (to allow the President's senior leadership team to administer regional interagency directorates as true interagency efforts). Only then will executive branch departments and agencies move beyond merely coordinating individual disparate efforts, as they do in their current incarnation at best, to being greater than the sum of their parts, and intending and achieving truly integrated effects, with the kinds of dominant and persistent results necessary to advance U.S. interests in this volatile, interconnected 21st-century world."
National Defense University Press: http://ndupress.ndu.edu/
PRISM (March 2011), v.2 no.2, p 29-46