SBIR Land Home › Forums › Institute & Agency Questions › National Science Foundation (NSF) › Reply To: National Science Foundation (NSF) at 7:23 pm #6605 Leisa@EGCModerator Hello! The Technology Readiness Level (TRL) scale, which ranges from 1-9, is used to gauge technology status. Typically, TRLs 1-3 are appropriate for Phase I, while TRLs 4-6 are appropriate for Phase II.
