What should Ben do if the FAR and FRR in his biometric system do not meet acceptable performance levels?

If the False Acceptance Rate (FAR) and False Rejection Rate (FRR) in a biometric system do not meet acceptable performance levels, the most appropriate action is to assess other biometric systems. This approach is crucial because if the current system's performance metrics are inadequate for security needs, simply adjusting settings or increasing staffing may not resolve the fundamental issues of effectiveness and reliability.

By evaluating alternative biometric solutions, Ben can explore systems that provide better accuracy, lower FAR and FRR, or improved user satisfaction. Different biometric modalities (like fingerprint recognition, facial recognition, or iris recognition) may have varying performance characteristics, so assessing other systems allows for a more informed decision that aligns with the organization's security requirements.

Regular audits and adjustments may enhance the existing system temporarily; however, if the foundational technology is flawed or poorly suited to the environment, those measures won’t yield the necessary improvements. Additionally, increasing staffing does not address the technical shortcomings of the biometric system and may only lead to higher operational costs without enhancing security effectiveness. Therefore, considering other biometric systems offers a holistic approach to resolving performance issues.