The ICDSST in 2018 is jointly organised by the Euro Working Group on Decision Support Systems EWG-DSS and the PROMETHEE DAYS Group. The joint-conference aims to provide a communication platform for scholars, researchers, developers, specialists and other professionals in the related areas of decision making and decision support, including DSS methodologies and technologies as well as application oriented solutions, to get together in order to exchange ideas, share experiences, discuss key issues, and identify future research and development directions.