Special issue on intelligent technologies for planning and decision making under uncertainty

One of the main challenges for intelligent decision technologies is to support decision making processes in which uncertainties about data, parameters or preferences are a major concern. The Operational Research and Computer Science communities have developed a large number of quite diversemodels and software tools with this purpose in mind. With the aim of gathering researchers presenting the most recent advances in these topics, the 25th Mini EURO Conference was held at the University of Coimbra, Portugal, 15–17 April 2010, on the theme “Uncertainty and Robustness in Planning and Decision Making”, with the support of the European Association of Operational Research Societies (EURO) and the COST Action “Algorithmic Decision Theory”. The conference provided a forum in which researchers coming from different scientific disciplines and backgrounds discussed case studies and methodological approaches to address uncertainty to obtain robust conclusionswith applications in several domains, thus paving the way for a cross-fertilization between distinct areas concerning the treatment of uncertainty in planning and decision support models. An unexpected case study, the Eyjafjallajökull volcano eruption in Iceland occurring during the conference and causing an ash cloud that