Performance modeling is a research field and methodological approach concerned with the quantitative prediction, evaluation, and understanding of the performance characteristics of systems, processes, or components. It investigates metrics such as throughput, latency, resource utilization, scalability, and reliability under various operational loads and configurations. This involves the development and application of analytical, simulation, or statistical models derived from system properties and observed behavior, providing crucial insights for design optimization, resource management, bottleneck identification, and validation of system capabilities.