The performance of a biometric system is expressed on the basis of two error indices:
FALSE ACCEPTANCE RATE (FAR): expresses how many times a person is incorrectly identified and authorized for access.
FALSE REJECTION RATE (FRR): expresses how many times a person is rejected instead of being correctly identified for access.
The two values are inversely proportional: that is, the more secure the access control system is, the less convenient it is to use because users could be more easily mistakenly rejected by the system.
The FAR and FRR can be configured with Argo App by selecting the
desired level of security, as follows:
| SECURITY LEVEL | FAR (false acceptance rate) | FRR (false rejection rate) |
| 1 | 1 are 200,000 | 1 are 10,000 |
| 2 | 1 is 1,000,000 | 1 is 6,000 |
| 3 | 1 are 10,000,000 | 1 is 4,000 |
