1. Director, CM Group, JINA Architects & Engineering Co., LTD, KFA Bldg 3F, 1581-13 Seocho-dong, Seocho-gu, Seoul 137-070, Korea. E-mail: json@jina.co.kr
2. Associate Professor, Dept. of Civil & Environmental Engineering, Michigan Technological Univ., Houghton, MI 49931.
3. Graduate Student, Construction Management, Dept. of Civil Engineering, Univ. of Nevada Las Vegas, Las Vegas, NV 89154.