This book presents decomposition algorithms for analyzing transient phenomena in multi-class queuing networks within the context of air transportation. It provides a rigorous mathematical framework for modeling and understanding the complex dynamics of passenger and aircraft flow in airport environments. The authors, Bertsimas, Odoni, and Peterson, offer a detailed analysis of queuing network behavior, focusing on the development and application of decomposition techniques to address the challenges of transient analysis. This work is essential for researchers and practitioners in the fields of transportation science, operations research, and applied mathematics seeking to optimize the performance and efficiency of air transportation systems.