EPRI: Electric Power Research Institute

Software Development


Technology Readiness Levels (TRLs)


TRL
Definition
TRL-1 Basic principles observed and reported
TRL-2 Technology concept and/or application and/or methodology formulated
TRL-3 Critical function and/or characteristic concept proven through analytical and experimental means
TRL-4 Components validated in laboratory environment; methodology validated via table-top exercise
TRL-5 Components validated in relevant environment; methodology validated in advanced detailed exercise
TRL-6 System/subsystem model or prototype demonstrated in a relevant environment; methodology demonstrated in member utility on pilot basis
TRL-7 System prototype demonstrated in an operational environment; methodology demonstrated in member utility on initial operational basis
TRL-8 Actual system completed and qualified through test and demonstration; methodology demonstrated in member utility on full operational basis
TRL-9 Actual system proven through successful operations; methodology widely adopted throughout industry

Download the Technology Readiness Levels (TRLs) (40 KB)