From Longman Business Dictionary
rationalizera·tion·al·ize /ˈræʃənəlaɪz/ (also rationalise British EnglishBrE) verb [intransitiveI, transitiveT]COMMERCE to make a business or organization more effective by getting rid of unnecessary staff, equipment etc, or reorganizing its structureThe company has been taking steps to rationalize its printing operations.
—rationalization (also rationalisation British EnglishBrE) noun [countableC, uncountableU]We shall press ahead with our rationalization and cost-reduction program.