1. Senior Lecturer in Construction Management, Dept. of Engineering and the Built Environment, Anglia Ruskin Univ., Bishop Hall Ln., Chelmsford CM1 1SQ, UK (corresponding author).
2. Ph.D. Student, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado at Boulder, UCB 428, 1111 Engineering Dr., Boulder, CO 80309.
3. Presidential Teaching Scholar and Beavers Endowed Professor of Construction Engineering, Dept. of Civil, Environmental, and Architectural Engineering, Univ. of Colorado at Boulder, UCB 428, 1111 Engineering Dr., Boulder, CO 80309.
4. Ph.D. Student, Anglia Ruskin IT Research Institute, Anglia Ruskin Univ., Bishop Hall Ln., Chelmsford CM1 1SQ, UK.