Questions Arise About NASA's SLS Estimates

NASA Heavy-Lift Assumptions Questioned, Aviation Week
“An independent analysis by Booz Allen Hamilton of NASA’s plans to develop the heavy-lift Space Launch System (SLS) raises questions about the cost assumptions the agency is using in its own estimates of what it will cost to build the big new rocket. “Due to unjustified, sometimes substantial future cost savings, the team views each program estimate as optimistic,” Booz Allen evaluators tell NASA managers in a preliminary presentation of their findings. The final report, and cost estimates, were expected on Capitol Hill Aug. 19. But NASA said it probably wouldn’t be ready until early the following week.”