1. Associate Professor, Institute of Construction Engineering and Management, National Central Univ., Jhongli, Taoyuang 32001, Taiwan.
2. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Maryland, College Park, MD 20742 (corresponding author).
3. Graduate Student, Institute of Construction Engineering and Management, National Central Univ., Jhongli, Taoyuang 32001, Taiwan.
4. A James Clark Chair Professor, Dept. of Civil and Environmental Engineering, Univ. of Maryland, College Park, MD 20742; Visiting Professor, Dept. of Management, Bialvstok Univ. of Technology, 16-001 Kleosin, Poland.