Athena Roumboutsos is an Associate Professor in the Department of Shipping, Trade and Transport at the University of the Aegean, Greece. Hans Voordijk is Associate Professor in Supply Chain Management in the department of Construction Management and Engineering and director of the PDEng program in Civil Engineering at Twente University, the Netherlands. Aristeidis Pantelias is a Senior Lecturer at the Bartlett School of Construction and Project Management and Programme Leader, MSc Infrastructure Investment and Finance, University College London, Faculty of the Built Environment, UK.