What does DSAC Annex B suggest for evaluating the effectiveness of security measures?

The correct answer emphasizes the importance of ongoing evaluation through regular monitoring of key performance indicators (KPIs) as a means to assess the effectiveness of security measures. This approach is proactive and allows organizations to continuously measure their security posture against defined metrics, ensuring that any weaknesses can be identified and addressed in real-time.

Regular monitoring encourages the integration of security measures into the overall operations of an organization, promoting a culture of safety and responsiveness to potential threats. By consistently evaluating performance through KPIs, organizations can adapt their strategies, enhance their defenses, and ensure that their security measures are not only sufficient but also evolving in response to changing risks and environments. This continuous feedback loop is critical in maintaining an effective security posture.

In contrast, one-time safety assessments do not provide the needed ongoing evaluation and can lead to complacency. While annual audits by external firms might offer some valuable insights, they lack the immediacy and frequency of monitoring that is vital in today's fast-changing threat landscape. Standardized industry benchmarks can serve as references, but without the real-time context provided by regular KPIs, they may not accurately reflect an organization's specific effectiveness in implementing security measures.