Robert Trent, Ph.D., is the supply chain management program director, associate director of the Manufacturing Systems Engineering program, and George N. Beckwith professor of management at Lehigh University, where he teaches at the undergraduate and graduate levels.  He holds a B.S. degree in materials logistics management from Michigan State University, an MBA from Wayne State University, and a Ph.D. in operations management from Michigan State University. This well known subject matter expert has authored four highly regarded books within the procurement and supply management field, several research projects published through the Center for Advanced Purchasing Studies  (CAPS) and numerous articles published in more than a dozen professional and academic journals and magazines. Dr. Trent is an active member of the Institute for Supply Management, serving for many years as the Professional Development Director of the NAPM Lehigh Valley chapter and, at the national level, as a member of the ISM Educational Resources Committee.    Llewellyn Roberts is President and founder of L. Roberts & Associates Inc., a firm that has provided a wide range of professional consulting and management development services to many of the largest and most successful companies in the world over the past twenty years.  He is an industrial engineer, consultant and published author specializing in the fields of business performance improvement, procurement and strategic sourcing, and logistics and supply chain management. Mr. Roberts is a sought-after and frequent speaker at professional conferences and universities worldwide and previously conducted lectures for the Executive Masters in International Logistics program at the Georgia Institute of Technology.  He has developed and delivered training to thousands of participants from hundreds of different companies on a wide variety of topics.  Amongst its various services, L. Roberts & Associates currently provides training in warehouse design and layout and warehouse management under license to Supply Chain Planning Limited, Cranfield University (UK).