Special section: New methodological and practical developments of the PROMETHEE methods: Introduction

This special issue contains a selection of full and revised papers that have been presented during the fourth International Workshop PROMETHEE Days 2017. The workshop has been held on May 11–12, 2017 at Portsmouth Business School, University of Portsmouth, UK. The aim of the workshop is to bring together researchers and practitioners from all the disciplines that engage with the PROMETHEE methods. The PROMETHEE methods have effectively been functional in many areas of research and several case studies. The number of practitioners who are applying the PROMETHEE method to operational multiple criteria decision problems, and researchers who are interested in studying the PROMETHEE method in-depth, increases constantly.