Technology Readiness Levels (TRLs) are a method for estimating the maturity of technologies. The use of TRLs enables consistent, uniform discussions of technical maturity across different types of technology. A technology's readiness level is determined during a Technology Readiness Assessment that examines program concepts, technology requirements, and demonstrated technology capabilities.
TRLs are based on a scale from 1 to 9 with 9 being the most mature technology, please find the definition of each level in the following list: