The organization of something into departments according to function, geographic location etc.(noun)
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Use "departmentalization" in a sentence
"This enterprise is beginning to look like a formal corporation, but it lacks the resources for rigid departmentalization."
"To hell with the fact that Venezuela is such a multiplicity of ethnics, political persuasions and individualities ... it's a replay of George W. Bush's 'you're with us or your're against us!' plagorization of Stalin's political departmentalization ... and we all know where that led millions of Georgians and Ukranians in a previous era."
"Q-- (in progress) -- several things on his mind, and how does he -- you always here a lot about departmentalization."