Performance models are analytical tools used to predict how a system will behave under various conditions. They help in understanding the efficiency and effectiveness of processes, whether in computing, manufacturing, or other fields. By simulating different scenarios, these models can identify potential bottlenecks and areas for improvement. These models often rely on mathematical equations and statistical methods to represent real-world systems. Common types include queueing models, simulation models, and statistical models. Performance models are essential for decision-making, allowing organizations to optimize resources and enhance overall performance.