Accelerating Legacy System Modernization in Government Costs and risks associated with government legacy systems continue to rise, as agencies and departments continue to leverage these mission critical systems without a modernization plan. 1 While the challenge of replacing these systems can be complex, there are highly pragmatic approaches to modernization that have proven very successful in government. This brief will identify risk factors associated with legacy systems, contrast different modernization approaches, and highlight best practices and recommendations for accelerating legacy system modernization initiatives. White Paper Application Modernization and Connectivity __________ 1 GAO Report 19-471 “Agencies Need to Develop Modernization Plans for Critical Legac

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