1. Ph.D. Candidate, Dept. of Construction Management and Quantity Surveying, Faculty of Engineering and the Built Environment, Univ. of Johannesburg, Johannesburg 2000, South Africa.
2. Associate Professor, Dept. of Construction Management and Quantity Surveying, Faculty of Engineering and the Built Environment, Univ. of Johannesburg, Johannesburg 2000, South Africa.
3. Professor, Dept. of Construction Management and Quantity Surveying, Faculty of Engineering and the Built Environment, Univ. of Johannesburg, Johannesburg 2000, South Africa.