This book constitutes the refereed proceedings of the Third International Conference on Operations Research and Enterprise Systems, ICORES 2014, held in Angers, France, in March 2014. The 18 revised full papers presented together with an invited paper were carefully reviewed and selected from 96 submissions. The papers are organized in topical sections on Methodologies and Technologies and Applications.

Disaster management is a process or strategy that is implemented when any type of catastrophic event takes place. Existing studies and approaches within disaster management have mainly been focused on some specific type of disasters with certain agency oriented.

This book constitutes revised selected papers from the 4^th International Conference on Operations Research and Enterprise Systems, ICORES 2015, held in Lisbon, Portugal, in January 2015.

The 14 papers presented in this volume were carefully reviewed and selection from a total of 89 submissions. They were organized in topical sections named: methodologies and technologies; and applications.

This book constitutes revised selected papers from the 5^th International Conference on Operations Research and Enterprise Systems, ICORES 2016, held in Rome, Italy, in February 2016.

The 14 papers presented in this volume were carefully reviewed and selection from a total of 75 submissions. They are organized in topical sections named: methodologies and technologies; and applications.