This book consists of five chapters. Chapter (1) presents a survey on the theory and applications of Bi-Level Multiple Criteria Decision Making (BL-MCDM) problems, Multi-level Multiple Criteria Decision Making (ML-MCDM) problems and TOPSIS approach in section (1-2). Section (1-3) contains a review on the software of problems in section (1-2).In chapter (2), TOPSIS was extended for solving Large Scale Bi-level Linear Multiple Objective Programming (LS-BL-LMOP) problems. In chapter (3), TOPSIS was extended for solving a special type of Bi-Level Integer Linear Multiple Objectives Decision Making...