Defense Acquisitions: DOD's Use of Other Transactions for Prototype Projects Has Increased, Report to Congressional Committees [open pdf - 450KB]
From the Highlights: "GAO [Government Accountability Office] was asked to review DOD's use of other transactions for prototype projects. For the purposes of this report, GAO refers to these instruments as prototype other transactions. This report examines, among other issues, (1) DOD's use of prototype other transactions for fiscal years 2016 through 2018 and (2) the extent to which agreements officers followed established review processes before awarding selected transactions. GAO analyzed Federal Procurement Data System-Next Generation data and examined relevant documents from a non-generalizable sample of 11 prototype other transactions. These transactions represented various dollar values from the four DOD components that had the highest obligations through prototype other transactions in fiscal year 2018. GAO also examined DOD and component policies and interviewed DOD officials."
Government Accountability Office: http://www.gao.gov/