Phase II would have begun after FAST and involved final design and construction of the CEV. However, this schedule was unacceptably slow to Mike Griffin, and the plan was changed such that NASA will issue a "Call for Improvements" (CFI) after the release of the ESAS for Lockheed Martin and Boeing to submit Phase II proposals.
Phase II was intended to follow FAST but faced delays due to Mike Griffin's concerns about the schedule. To address this, NASA issued a "Call for Improvements" (CFI) after the release of the ESAS for Lockheed Martin and Boeing to propose solutions for Phase II.