The sensitivity can be reduced to make it more flexible in accepting your fingerprints. But here you need to be extra cautious. If you reduce the sensitivity beyond a point, it may start accepting unauthorized users if the pattern of the finger of an unauthorized user closely matches with that a registered user.
When a registered user is denied access (high sensitivity) or an unauthorized user is accepted (low sensitivity), both can cause disruption to the business.
How do you measure the accuracy of the biometric device?
To measure the accuracy of Biometric you need to determine the FRR, FAR and CER of the device.
FRR is False Reject Rate, that means the percentage of instances when a registered user is denied access (rejected).
FAR is False Accept Rate, that means the percentage of instances when an unauthorised user is given access (accepted).
FRR and FAR both can be adjusted by changing the sensitivity of the device. If you plot the graph it will look as below:
A device with lower CER will give more accurate results. So next time when you buy a biometric device, ask for the CER value from the manufacturer to compare two devices.