| TRL Definition
| TRL/CRL Score
| CRL Definition
| CRL Category
|
| Basic principles observed |
1 |
Phenomenon observed and reported. Problem defined. |
Basic Research |
|
| Technology concept and/or application formulated |
2 |
Hypothesis formed, preliminary studies to define parameters. Demonstrate feasibility. |
Basic Research |
|
| Analytical and experimental critical function/proof-of-concept |
3 |
Validated hypothesis. Understanding of scientific processes underlying problem. |
Basic Research |
Research to Prove Feasibility |
| Component and/or breadboard validation in lab |
4 |
Formulation of countermeasures concept based on understanding of phenomenon. |
Countermeasure Development |
Research to Prove Feasibility |
| Component and/or breadboard in relevant environment |
5 |
Proof of concept testing and initial demonstration of feasibility and efficacy. |
Countermeasure Development |
Research to Prove Feasibility |
| System/subsystem model or prototype demonstration in relevant environment |
6 |
Laboratory/clinical testing of potential countermeasure in subjects to demonstrate efficacy of concept. |
Countermeasure Development |
|
| Subsystem prototype in a space environment |
7 |
Evaluation with human subjects in controlled laboratory simulating operational space flight environment. |
Countermeasure Development |
Countermeasure Demonstration |
| System completed and flight qualified through demonstration |
8 |
Validation with human subjects in actual operational space flight to demonstrate efficacy and operational feasibility. |
|
Countermeasure Demonstration |
| System flight proven through mission operations |
9 |
Countermeasure fully flight-tested and ready for implementation. |
Countermeasure Operations |
Countermeasure Operations |
