Which of the following is NOT a reason for performing security checks?

Maintaining brigade discipline is not inherently a direct reason for performing security checks. Security checks primarily focus on ensuring officer safety, confirming the status of officers, and managing the details of situations, especially following major incidents. These checks are intended to provide immediate insights into the safety and readiness of officers, rather than serving as a means to uphold organizational discipline. While discipline may be a broader goal within the operational context, it does not directly correlate with the primary functions of security checks, which are more tactical and situational in nature.