Since 1995, GAO has designated the Department of Defense's (DOD) multibillion dollar business systems modernization program as high risk, and it continues to do so today. To assist in addressing DOD's modernization challenges, the Ronald W. Reagan National Defense Authorization Act for Fiscal Year 2005 requires the department to, among other things, report specific information about business system investments, including (1) milestones and actual performance against specified measures and any revisions and (2) actions taken to certify that a modernization investment involving more than $1 million meets defined conditions before obligating funds. The act also directs GAO to review each report. As agreed, GAO focused on the fiscal year 2010 report's compliance with, among other things, these provisions of the act. To do so, GAO compared DOD's report to the act's reporting requirements, interviewed DOD officials, analyzed relevant documentation, and leveraged prior GAO reports. GAO is recommending that future annual reports include additional information about investment performance measures and certification actions and that DOD guidance be revised to ensure that certification submissions disclose unresolved GAO findings and recommendations. DOD agreed with GAO's recommendations.