Concept of decomposition-coordination techniques. Decomposition-coordination of large scale static optimization problems, goal coordination technique, model coordination and mixed method. Optimization and control of large scale linear quadratic problems, goal coordination method, interaction-prediction approach, Tamura's algorithms, hierarchical optimal controller, the concept of decentralized control. Optimization and control of nonlinear systems. Introduction to model simplification, aggregation technique. Introduction to time scale modeling and singular perturbation.