Warren D. Seider is Professor of Chemical Engineering at the University of Pennsylvania. He received a B.S. degree from the Polytechnic Institute of Brooklyn and M.S. and Ph.D. degrees from the University of Michigan. Seider has contributed to the fields of process analysis, simulation, design, and control. He has authored or coauthored over 110 journal articles and authored or edited seven books. He helped to organize the CACHE (Computer Aids for Chemical Engineering Education) Committee in 1969 and served as its chairman. Seider is a member of the Editorial Advisory Board of Computers and Chemical Engineering. Daniel R. Lewin is Professor of Chemical Engineering, the Churchill Family Chair, and the Director of the Process Systems Engineering (PSE) research group at the Technion, the Israel Institute of Technology. He received his B.Sc. from the University of Edinburgh and his D.Sc. from the Technion. He has authored or co-authored over 100 technical publications in the area of process systems engineering, as well as the first three editions of this textbook, and the multimedia CD that accompanies it. J. D. Seader is Professor Emeritus of Chemical Engineering at the University of Utah. He received B.S. and M.S. degrees from the University of California at Berkeley and a Ph.D. from the University of Wisconsin. In 2004, he received, with Professor Warren D. Seider, the Warren K. Lewis Award for Chemical Engineering Education from the AIChE. In 2008, his textbook, "Separation Process Principles" with co-author Ernest J. Henley, was cited as one of 30 ground-breaking books in the last 100 years of chemical engineering. Soemantri Widagdo is a retired R&D executive after a 15-year career at 3M. His last position was the R&D Head of 3M Southeast Asia. He received his B.S. degree in chemical engineering from Bandung Institute of Technology, Indonesia, and his M.Ch.E. and Ph.D. degrees from Stevens Institute of Technology. He has been involved in a variety of technology and product-development programs involving renewable energy, industrial and transportation applications, consumer office products, electrical and electronics applications, health care and dentistry, and display and graphics applications. He has authored and co-authored over 20 technical publications and two patents. Rafiqul Gani is Professor of System Design at the Department of Chemical & Biochemical Engineering, The Technical University of Denmark and the head and co-founder of the Computer Aided Product-Process Engineering Center (CAPEC). He received a B.S degree from the Bangladesh University of Engineering and Technology, and M.S., DIC and Ph.D. degrees from Imperial College, London. He has published more than 200 peer-reviewed journal articles and delivered over 300 lectures, seminars and plenary/keynote lectures at international conferences, institutions and companies all over the world. Professor Gani is currently (2014-2016) the president of the EFCE (European Federation of Chemical Engineering); a member of the Board of Trustees of the AIChE; a Fellow of the AIChE and also a Fellow of IChemE. Ka Ming Ng is Chair Professor of Chemical and Biomolecular Engineering at the Hong Kong University of Science and Technology. He obtained his B.S. degree from the University of Minnesota and his Ph.D. from the University of Houston. His research interests center on product conceptualization, process design and business development involving water, natural herbs, nanomaterials, and advanced materials. He is a fellow of the American Institute of Chemical Engineers where he received the Excellence in Process Development Research Award in 2002.