1. Chair of Logistics, Institute of Technology and Management, Technische Universität Berlin, 10623 Berlin, Germany
2. Department of Human Resource and Organisational Development, School of Business, Kwame Nkrumah University of Science and Technology, Kumasi 00233, Ghana
3. Department of Procurement, Logistics and Transport, College of Business and Economics, University of Rwanda, Kigali 4285, Rwanda