Ying Tat Leung is a Principal Research Staff Member at the IBM Almaden Research Center in California, U.S.A. His research interests are in modeling and analysis of production and service systems for the purposes of business strategy formulation, performance management, and resource optimization. With colleagues in Global Business Services, he also serves as a technical consultant to IBM clients. Before moving to Almaden in 2004, he worked in supply chain management research, including demand planning, inventory replenishment, and product pricing, at the IBM Thomas J. Watson Research Center and Philips Laboratories in New York, for 15 years. In 2008, with co-authors Jesse Bockstedt and Wolfgang Koenig he won the Best Practitioner Presentation Award at the Frontiers in Service Conference. In 2012, with coauthors Axel Hochstein and Matt Denesuk, he won the Best Paper award at the IEEE International Conference on Service Operations and Logistics, and Informatics. He is currently on the editorial board of International Journal of Service Operations and Informatics and Service Science. Ying Tat holds a B.Sc. degree from University of Hong Kong, M.S. and Ph.D. degrees from University of Wisconsin – Madison, all in Industrial Engineering.