This is an advanced course that delves into the theory, methods, and applications of network models in solving complex optimization problems involving interconnected systems. Network models provide a powerful framework for analyzing and optimizing flows, routes, and connections within various types of networks. This course introduces students to different types of network models, such as shortest path, minimum spanning tree, maximum flow, and more, equipping them with the skills to formulate, analyze, and solve optimization problems in interconnected systems.