Recent experiences from carrying out Design for Assembly (DFA) and Design for Manufacture (DFM) product studies in industry have reinforced the authors’ belief that consideration of manufacturing problems at the design stage is the major means available for improving product quality, reducing manufacturing costs and increasing productivity. In the second edition, as well as providing further information to help select processes for components and the joining of components, we have included data on assembly process selection and costing. This can all be used to support DFA/DFM projects and associated activities.