1. Professor, Graduate Institute of Construction Engineering and Management, National Central Univ., Jhongli City, Taoyuan 32001, Taiwan (corresponding author).
2. Professor, Dept. of Construction Management, Chung Hua Univ., Hsinchu 30012, Taiwan.
3. Professor, Dept. of Computer Science and Information Engineering, Chung Hua Univ., Hsinchu 30012, Taiwan.
4. Engineer, Dept. of Tunnels and Geotechnical Engineering, China Engineering Consultants Inc., Taipei 11491, Taiwan.
5. Engineer, Dept. of Business and Research, China Engineering Consultants Inc., Taipei 11491, Taiwan.
6. Dept. of Computer Science, National Chiao Tung Univ., Hsinchu 30010, Taiwan.