In the past, vertical integration was a way to gain efficiency in supply chains. Today, vertical integration doesn't work as well because specialty organizations have developed to perform specific tasks very efficiently. Efficiency through supply chains is achieved today by linking specialists throughout the vertical business hierarchy. This sort of linkage is possible because of the technology that has developed which facilitates it, making today supply chains both faster and more cost effective. "Supply Chain Information Technology" surveys the different systems that are used by businesses to achieve these efficiencies. This book describes how these systems provide supply chains with information system support. The design of these systems and the tasks they perform are demonstrated with the help of analytic techniques and models that are used in the book.