Luis Puigjaner obtained his M.S. (Engineering) degree from the UPC, and a Ph.D. degree from the Polytechnic University of Madrid. He holds also a MS degree from the University of Houston. He became a member of the Higher Scientific Research Council of Spain (1972) and is currently Professor of Chemical Engineering at UPC, Director of the Environmental Center (LCMA) and the Head of a research group of 32 people with several projects in different areas of process systems engineering. He has over 350 refereed publications. His professional experience includes teaching and research positions at several Institutions (Purdue University, Stanford University, Max Planck Institute, and King's College, University of Houston, Imperial College, Cork Technical College, UNAM, UNICAMP and NASA).

Georges Heyen is a professor in Chemical Engineering at the University of Liege, Belgium, with teaching, research and consultancy interests in process systems engineering. He teaches courses ranging from applied chemical thermodynamics to modelling and plant design. He took part in several international projects financed by the European Union to carry research and development on process optimisation tools and methods, in collaboration with major European universities and research centres. He is one of the founders of the company Belsim, which is active in software development for process modelling and optimisation, especially using online data validation techniques.