Define performance metrics in the context of APM.

In the context of Application Portfolio Management (APM), performance metrics are primarily quantitative measures that evaluate the efficiency and effectiveness of applications in an organization's portfolio. These metrics provide measurable data points that can help stakeholders understand how well applications are performing in terms of resource utilization, speed, reliability, and overall contribution to business objectives.

Quantitative measures, such as response times, transaction volumes, error rates, and resource consumption, allow organizations to assess applications accurately and make informed decisions regarding application portfolios. By focusing on these clear numerical indicators, organizations can identify underperforming applications that may need improvement, redesign, or even retirement.

While qualitative measures, such as user satisfaction assessments, also play a crucial role in the overall evaluation of applications, performance metrics specifically emphasize the numerical data that indicate application performance, making option B the most accurate definition in the context of APM.