The integration of Space Development Agency (SDA) systems across the two-year "tranche" development cycle is a significant hurdle facing the agency, according to a report by the SDA Independent Review Team (IRT). "Integration challenges do not scale linearly and will become untenable to manage at current staffing levels," the report said. "SDA has architected itself into being the system integrator of multiple tranches, each with multiple capabilities, various orbital planes, and multiple vendors for each acquisition. This level of systems…