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Natalie Simpson is Associate Professor of Operations Management and Strategy at the University at Buffalo (SUNY) School of Management. Natalie received a BFA from the University of North Carolina School of the Arts and both an MBA and PhD from the University of Florida. She has earned numerous distinctions including the SUNY Chancellor’s Award for Teaching Excellence and the Wickham Skinner Teaching Innovation Award from the Production and Operations Management Society. Philip Hancock is co-owner of Glenochil Associates LLC, a consultant & trainer, and a Certified Professional in Supply Management (CPSM) and Supplier Diversity (CPSD). Philip received an MBA and PhD from Napier University in Scotland, and has substantial experience in both commercial banking and government procurement. He has earned numerous distinctions including the Diploma in Company Direction from the Institute of Directors (IoD) and is a Chartered Banker from the Chartered Institute of Bankers in Scotland (CIOBS). Both Philip and Natalie also serve as the original tutors in the NoteShaperTM video tutorials that accompany the practice problems in this text.

Professor Iyer is the Associate Dean for Graduate Programs and the Susan Bulkeley Butler Chair in Operations Management and the Director of DCMME (Dauch Center for the Management of Manufacturing Enterprises)and GSCMI (the Global Supply Chain Management Initiative) at the Krannert School of Management, Purdue University. Previously, he was Purdue University Faculty Scholar from 1999-2004. Iyer has a PhD from Georgia Tech, MS from Syracuse, and BaTech IIT Bombay. He is a Department Editor of Management Science, Associate Editor of Operations Research, is on the editorial boards of Operations Research Letters, IIE Transactions, the ECR Journal and Manufacturing and Service Operations Management, and is a member of INFORMS. He was president-elect of the MSOM Society of INFORMS in 2001-2 and served as president for the year 2002-3. Prior to joining the Krannert faculty in 1996, Professor Iyer taught at the University of Chicago.


F. Robert Jacobs is Professor of Operations Management at the Kelley School of Business, Indiana University. He has degrees in Industrial Engineering, Computer and Information Science, an MBA, and a Ph.D. in Operations Management. He is the author of many books and over 50 research articles on topics that include enterprise resource planning, inventory control, the design of manufacturing facilities, cellular manufacturing and the scheduling of manufacturing operations. Professor Jacobs is a fellow of the Decision Sciences Institute and past president.  Rhonda Lummus has taught Operations Management, Manufacturing planning, Supply chain management, Operations strategy and other courses at Indiana University, Iowa State University, and Central Missouri State after a career in manufacturing with companies such as Universal Gym, Snap-On Tools, and Perfex Corp. She is an active international speaker, CSCP, CPIM, CIRM, and a Certified Fellow of APICS.