Decision Models in Manufacturing Engineering is the first book to describe the decision making problem that arise in industry at design section with mechanical properties. The book introduces the decision models for best selective material processes. These models are explored in terms of fatigue theory as well as product life cycle is explained and their optimization problems are discussed analytically. The fatigue life of product merged on the best selection of material for better product development, Considering economic aspect of present situation. In this book, the writer dives deeper into optimization technique to find out product life. Material selection is a difficult and subtle task, due to the immense number of different available materials.