ROI (Return on Investment) can be best measured by:

Return on Investment (ROI) in security is often measured by cost savings, such as the reduction of manpower through automation, improved efficiency, or optimized processes. For example, implementing advanced surveillance or access control systems can reduce the need for physical security personnel while maintaining or enhancing the security posture.

ASIS Certified Protection Professional (CPP®) References:

Security Program Metrics: CPP materials emphasize evaluating ROI based on cost reductions, risk mitigation, and improved operational efficiencies.

Economic Justification of Security Investments: Reduction in manpower costs is a key metric in assessing the financial benefits of security measures.