text: Contracted tasks included "reviewing requirements and synthesizing a set of study ground rules and assumptions emphasizing system reliability, automated/ground command operability, and affordability, establishing velocity (Δv) budgets from and to low lunar orbit for pragmatic lunar landing sites, exploring a wide variety of lunar lander concept options, including staging, propellants, engines, reusability, autonomy, systems capabilities for exploration, as well as landing site flexibility, and establishing the design trade space and pragmatic limits for future more detailed analysis and development."