Data Center Consolidation: Reporting Can Be Improved to Reflect Substantial Planned Savings, Report to Congressional Requesters [open pdf - 9MB]
From the Highlights: "In 2010, as focal point for information technology management across the government, OMB's [Office of Management and Budget] Federal Chief Information Officer launched the Federal Data Center Consolidation Initiative to consolidate the growing number of centers. As of May 2014, agencies reported a total of 9,658 data centers--approximately 6,500 more than reported by OMB in 2011. GAO [Government Accountability Office] was asked to review federal agencies' continuing efforts to consolidate their data centers and achieve cost savings. The objectives were to (1) evaluate the extent to which agencies have achieved cost savings to date and identified future savings through their consolidation efforts, (2) identify agencies' notable consolidation successes and challenges in achieving cost savings, and (3) evaluate the extent to which data center optimization metrics have been established. GAO assessed agency-reported cost savings and avoidance documentation, interviewed agency officials, and assessed data center optimization metrics against prior OMB requirements and goal."
Government Accountability Office: http://www.gao.gov/