The following is the Aug. 9, 2019 Government Accountability Office report, Guided Missile Frigate: Navy Has Taken Steps to Reduce Acquisition Risk, but Opportunities Exist to Improve Knowledge for Decision Makers.
From the report
What GAO Found
The Navy undertook a conceptual design phase for the FFG(X) Guided Missile Frigate program that enabled industry to inform FFG(X) requirements, identify opportunities for cost savings, and mature different ship designs. The Navy also streamlined the FFG(X)...
https://news.usni.org/2019/08/12/gao-report-on-navy-frigate-program