Drawn from research papers presented at two closed-forum research meetings sponsored by the U.S. Federal Aviation Administration and the European Eurocontrol, this book explains the technical nature of a very complex international air transportation system. It reports on research that is furthering the evolution of the international air transportation systems. The book promotes our understanding of the technical attributes of delay and its economic effects on aviation-related business. The application of mathematical analyses and principles is a growing area of aviation. This book contributes to expanding our understanding of this area. It also provides approaches to airspace management and new roles for controllers and pilots.- Data and information appearing in this book are for informational purposes only. AIAA and the author are not responsible for any injury or damage resulting from use or reliance, nor do AIAA and the author warrant that use or reliance will be free from privately owned rights.