This book includes extended and revised versions of selected papers from the 9th and 10th edition of the International Conference on Operations Research and Enterprise Systems (ICORES 2020 and ICORES 2021). ICORES 2020 was held in Valletta, Malta from 22 - 24 of February 2020, and ICORES 2021 was held as an online event due to the Covid-19 pandemic, from 4 - 6 of February 2021. The 11 full papers included in this book were carefully reviewed and selected from 132 submissions. The ICORES 2020 and 2021 book contains extended and revised version of proceedings papers dealing with operations research and enterprise systems.

This book constitutes revised and selected papers from the 8th International Conference on Operations Research and Enterprise Systems, ICORES 2019, held in Prague, Czech Republic, in February 2019. The 9 extended and revised papers presented in this volume were carefully reviewed and selected from a total of 80 submissions. They were organized in topical sections named methodologies and technologies and applications.

This book constitutes revised selected papers from the 6th International Conference on Operations Research and Enterprise Systems, ICORES 2017, held in Porto, Portugal, in February 2017. The 15 papers presented in this volume were carefully reviewed and selected from a total of 90 submissions. They are organized in topical sections named: methodologies and technologies; and applications.

This book constitutes revised selected papers from the 7th International Conference on Operations Research and Enterprise Systems, ICORES 2018, held in Funchal, Madeira, Portugal, in January 2018. The 12 papers presented in this volume were carefully reviewed and selected from a total of 59 submissions. They are organized in topical sections named: methodologies and technologies; and applications.