NASA Updated Crew Exploration Vehicle Lien Closure Implementation Plan, May 23, 2007
"Primary objective - Develop a system design that closes on weight and cost, including required Managers Reserve (1000-2000 lbs) - Primary objective likely wont be met by SDR
What is off limits?
- OML size and shape
- 6 crew to ISS/4 crew to Lunar
- Changes to subsystem basic technology or architecture (i.e., amine swing beds v. LiO canisters, LIDS vs. probe and cone)"