Which of the following best describes the role of performance metrics in supply chain management?

The role of performance metrics in supply chain management is primarily focused on assessing and tracking the effectiveness of processes. These metrics provide quantitative measures that help organizations evaluate various aspects of their supply chain operations, including efficiency, quality, and overall performance. By utilizing these metrics, companies can identify areas that require improvement, monitor progress towards goals, and make informed decisions that enhance operational efficiency.

Performance metrics can cover various dimensions, such as the speed of delivery, accuracy of orders, and inventory turnover rates. This data not only aids in understanding how well the supply chain is functioning but also facilitates strategic planning and process optimization. Therefore, option B accurately encapsulates the core function of performance metrics within the context of supply chain management.