Data Center Consolidation: Agencies Making Progress, but Planned Savings Goals Need to be Established, Report to Congressional Committees [open pdf - 35MB]
From the Highlights: "In 2010, as the focal point for information technology management across the government, OMB's [U.S. Office of Management and Budget] Federal Chief Information Officer launched the Federal Data Center Consolidation Initiative to reduce the growing number of centers. Information technology reform legislation was subsequently enacted in December 2014 that included a series of provisions related to the federal data center consolidation effort, including requiring agencies to report on cost savings and requiring GAO [U.S. Government Accountability Office] to annually review agency inventories and strategies. GAO's objectives were to (1) review agencies' data center closures to date and plans for further closures, (2) evaluate agencies 'progress in achieving consolidation savings and describe plans for future savings, and (3) assess agencies' progress against OMB's data center optimization targets. To do so, GAO assessed agencies' data center inventories, reviewed agency-reported cost savings and avoidance documentation, and compared agencies' data center optimization data as of November 2015 against OMB's established targets. […] GAO is recommending that 10 agencies take action to address challenges in establishing, and to complete, planned data center cost savings and avoidance targets. GAO is also recommending that 22 agencies take action to improve optimization progress, including addressing any identified challenges. Fourteen agencies agreed with GAO's recommendations, 4 did not state whether they agreed or disagreed, and 6 stated that they had no comments."
Government Accountability Office: http://www.gao.gov/