(1) Vendor needs to provide electronic health record deployment solution. • Functions as a system of systems by integrating commercially available, off–the–shelf (COTS) EHR components from multiple vendors. • This integration, combined with its enormous scale, creates a high level of complexity. • The solution is comprised of 12 major subsystems, utilizes 81 interfaces across more than 1,000 end points, and processes at least 20 million messages daily.