1. Department of Construction Technology and Management, Debre Markos University, Debre Markos, Ethiopia
2. Faculty of Civil and Water Resources Engineering, Bahir Dar University, Bahir Dar, Ethiopia
3. Department of Construction Technology and Management, University of Gondar, Gondar, Ethiopia
4. College of Architecture, Art and Design, Mississippi State University, Starkville, USA
5. Department of Civil Engineering, Campus De Azurem, University of Minho, Guimaraes, Portugal