Process Integration supporting process design, integration and optimisation has been around for more than 40 years. Its development has been closely related to developing the Chemical Engineering, implementation of mathematical modelling and the application of information technology. Its development has been accelerating as the methodology has been able to provide answers and support for important issues regarding economic development energy, water and resources better utilisation and savings. This contribution is. targeted towards a short overview of recent achievements and future challenges. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.