An Adaptive Hyperplane Approach for Multiple Objective Optimization Problems with Complex Constraints Runwei Cheng Department of Industrial and Information Systems Engineering Ashikaga Institute of Technology Room 103, Hakusan 4-34-10 Bunkyo-ku, Tokyo 112-0001, Japan runweicheng@hotmail.com Phone/Fax: +81(3)3947-8288 Mitsuo Gen Department of Industrial and Information Systems Engineering Ashikaga Institute of Technology Omae-chao 268, Ashikaga 326-8558, Japan gen@ahsitech.ac.jp Phone: +81(284)62-0605 Fax: +81(284)64-1071 Shmuel S. Oren Department of Industrial Engineering and Operations Research University of California Berkeley, CA 94720 USA oren@ieor.berkeley.edu Phone: +1(510)642-4989 Fax: +1(510)642-1403