Technology Readiness Levels (TRL) are a way of classifying the timeline of an innovation from the first idea to the finished product with levels ranging from TRL1 to TRL9. See: Technology Readiness Levels, Timelines and Interview Priorities (2023 EIC Accelerator Work Programme Part 4) and How the EIC Accelerator Funds Technology Readiness Levels (TRL) (SME Instrument)