**GAO-08-1073**                      Published: Sep 30, 2008. Publicly Released: Sep 30, 2008.                  

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## Highlights

In 1996, DOD initiated the Space Based Infrared System (SBIRS) to replace the nation's current missile detection system, and to provide expanded missile warning capability. Since then, SBIRS has been restructured several times to stem cost increases and schedule delays, including revising program goals in 2002, 2004, and 2005. These actions were partly due to the challenges of developing sophisticated technologies and software. In 2007, SBIRS had a major setback when flight software for the first satellite underwent testing and failed, a failure caused by design issues. DOD developed a plan for resolving these issues, and revised its cost and schedule goals. GAO has assessed (1) the approach used to mitigate the problems, and (2) the cost and schedule risks and challenges of that approach. To conduct our work, GAO has contacted, met with, and performed detailed work at numerous DOD and contractor offices; and reviewed technical documents on flight software.

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## Topics

Government Operations

AccountabilityAerospace industryAerospace researchCost analysisDefense capabilitiesDefense cost controlDefense operationsDefense procurementDepartment of Defense contractorsIntegrated softwareOperational testingProgram evaluationProgram managementSatellitesSchedule slippagesSoftwareSoftware verification and validationStrategic planningSystems analysisSystems designSystems evaluationSystems managementTestingCost estimates