As the reliable and design softwares are easily available, now it is the time to concentrate on producing not only safe designs but also to produce economical designs. For this standard softwares are available. But to use them confidently design engineers should have basic knowledge of optimization like mathematical formulation and suitability and limitation of the software. Hence now a daysdesign engineers must undergo a basic course in optimization. With this aim theauthor has written the book and hopes that students and faculty will accept itas useful textbook in engineering design.