1. ISO: International Organization for Standardization. ISO 8402 International Standard: Quality Vocabulary. Geneva Switzerland 1986.
2. DoDI 5000.02. Department of Defense Instruction: Operation of the Defense Acquisition System January 7 2015.https://www.acq.osd.mil/fo/docs/500002p.pdf.
3. Operational Test Director and Evaluation. FY 2016 Annual Report 2016(accessed August 31 2020).https://www.dote.osd.mil/Publications/Annual‐Reports/2016‐Annual‐Report/