Which of the following best describes the focus of QoS Based Alerts?

The focus of QoS (Quality of Service) Based Alerts is primarily concerned with tracking quality changes, particularly for high-value customers. This approach is vital for organizations that prioritize customer experience and satisfaction, especially for those clients who contribute significantly to the business's revenue. By monitoring quality changes, businesses can proactively identify issues that may impact these key customers, allowing for timely interventions to enhance service quality and customer retention.

In contrast, monitoring software usage and assessing customer interactions do not intrinsically target changes in service quality or the specific needs of high-value customers. While these aspects are certainly important in a broader context, they do not specifically highlight the quality-centric focus inherent in QoS Based Alerts. Calculating operational costs also does not align with the purpose of QoS, as it is more about financial metrics rather than the qualitative assessment of interactions and services provided to critical customer segments. Therefore, choice C accurately reflects the essence of QoS Based Alerts in terms of enhancing service quality for important clients.