[1] Copperbelt Univ, Sch Built Environm, Dept Construction Econ & Management, Kitwe, Zambia
[2] Leeds Beckett Univ, Sch Built Environm Engn & Comp, Leeds, England
[3] Univ Johannesburg, Dept Construction Management & Quant Surveying, Auckland Pk, Johannesburg, South Africa
[4] Ardhi Univ, Sch Architecture Construction Management & Econ, Dar Es Salaam, Tanzania