The International Conference on Sustainable Intelligent Manufacturing (SIM 2011) was held at Leiria by the Center for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria, Leiria, Portugal, from June 29 to July 1, 2011. The Conference aims to provide a major international forum for academics, researchers and industrial partners to exchange ideas in the field of sustainable intelligent manufacturing and related topics. The conference expects to foster networking and collaboration among participants to advance the knowledge and to identify major trends in the field.