Until now, there has not been an effective presentation of the dynamics of operation systems illustrating how ERP systems are used. This book and the accompanying software will fill this need. Enterprise Resource Planning has been written with an emphasis on manufacturing firms, but the principles it demonstrates are transferable to other types of operation systems. With this in mind, service operations issues have been included as a part of the problems at the end of each chapter. The book and the accompanying software have been designed for use in academic and executive programs aimed at helping researchers, students, and professionals to understand how integrated operational systems work.