• Professor Benjamin Lev of Drexel University is currently the chief editor of Omega the International Journal of Management Science since 2002, the chief editor of International Journal of management science and engineering management, editor in chief of interfaces book review and international abstracts of Editorial board member of international journals such as or, operations research perspective journal, and researcher of American academic information. Professor Benjamin Lev is a well-known international expert in the field of management science. He has profound knowledge in the fields of inventory management, mathematical planning, operation management and scheduling. His research interests include inventory control, mathematical planning, and job planning and scheduling. Several papers have been published in international top journals in the fields of management science and operation research.