기술성숙도(TRL, Technology Readiness Level) TRL(Technology Readiness Level) is a systematic metric that is used to assess the maturity of a particular technology. The TRL scale ranges from 1 to 9, with each level representing a different stage in the development of a technology: TRL 1 - Basic Principles Observed: This is the lowest level, indicating that scientific research has begun, and there is an..