authorized users usability queues
False Rejection Rate (FRR)
The probability that a biometric system incorrectly rejects a legitimate, enrolled, and authorized user.
FRR directly affects user experience, entry queue length, and admin workload — especially at high-traffic entry points.
Frequently Asked Questions about False Rejection Rate (FRR)
What causes high false rejection rates?
Poor enrollment quality, dirty or wet fingers, inconsistent face positioning, bad lighting, hardware aging, and mismatch between enrollment and usage conditions.
How can FRR be reduced in daily operations?
Ensure high-quality enrollment, clean sensors regularly, use adequate lighting at entry points, and schedule re-enrollment for users with consistently high rejection rates.
What is the acceptable FRR for attendance systems?
For employee attendance, FRR below 1% is generally acceptable. Higher FRR slows entry, frustrates users, and forces manual overrides — increasing admin cost.
