PDFTechnology Readiness Levels: A White Paper. April 6, 1995
John C. Mankins, Advanced Concepts Office
Office of Space Access and Technology, NASA

PDFHRST Technology Assessments Technology Readiness Levels, A Chart.

PDFResearch & Development Degree Of Difficulty (R&D3) A White Paper March 10, 1998
John C. Mankins, Advanced Projects Office
Office of Space Flight, NASA Headquarters


PDF* (pdf).


Owner: Dr. Michael Greenfield/ NASA Q
Curator: Bill Loewy/ NASA QS