Mission Concept Review is a milestone in NASA's Program/Project Lifecycle: https://www.nasa.gov/sites/default/files/atoms/files/nasa_systems_engineering_handboo

Mission Concept Review is a milestone in NASA's Program/Project Lifecycle: https://www.nasa.gov/sites/default/files/atoms/files/nasa_systems_engineering_handbook_0.pdf https://www.nasa.gov/sites/default/files/atoms/files/nasa_sy.... It sits between the "Concept Studies" and "Concept and Technology Development" phases.