This volume examines various aspects of shape optimization of two-dimensional continuum structures, including shape design sensitivity analysis, structural analysis using the boundary element method (BEM), and shape optimization implementation. The aim of the book is to provide the reader with a general view of practical shape optimization techniques, and of current research. Two new techniques for shape design sensitivity analysis are described in detail. Aimed at students of design engineering (civil and mechanical) as an introductory text to optimum design, the book also provides information on shape optimization and on some new techniques for numerical optimization techniques for researchers who are interested in optimum design.