This bookconstitutes revised selected papers from the 4th InternationalConference on Operations Research and Enterprise Systems, ICORES 2015, held inLisbon, Portugal, in January 2015.The 14papers presented in this volume were carefully reviewed and selection from atotal of 89 submissions. They were organized in topical sections named: methodologiesand technologies; and applications.

This bookconstitutes revised selected papers from the 4th InternationalConference on Operations Research and Enterprise Systems, ICORES 2015, held inLisbon, Portugal, in January 2015.The 14papers presented in this volume were carefully reviewed and selection from atotal of 89 submissions. They were organized in topical sections named: methodologiesand technologies; and applications.

This bookconstitutes revised selected papers from the 4th InternationalConference on Operations Research and Enterprise Systems, ICORES 2015, held inLisbon, Portugal, in January 2015.The 14papers presented in this volume were carefully reviewed and selection from atotal of 89 submissions. They were organized in topical sections named: methodologiesand technologies; and applications.