1. Ph.D. Research Student, School of Construction Management and Engineering, Univ. of Reading, Whiteknights, P.O. Box 219, Reading, Berkshire RG6 6AW, U.K.
2. Professor, School of Construction Management and Engineering, Univ. of Reading, Whiteknights, P.O. Box 219, Reading, Berkshire RG6 6AW, U.K.
3. Ph.D. Student, School of Architecture, Yeungnam Univ., 280 Daehak-ro, Gyeongsan-si, Gyeongbuk 712-749, Republic of Korea.
4. Assistant Professor, School of Architecture, Yeungnam Univ., 280 Daehak-ro, Gyeongsan-si, Gyeongbuk 712-749, Republic of Korea (corresponding author).