Introduction Manufacturing is preceeded by geometric design.Geometric design involves determining the dimensions and topology of a part. Manufacturing process planning determines how a product is to be manufactured and is a key element in the manufacturing process. Shanghai Jiao Tong University 3Shanghai Jiao Tong University 3 Introduction n Manufacturing is preceeded by geometric design. Geometric design involves determining the dimensions and topology of a part. n Manufacturing process planning determines how a product is to be manufactured and is a key element in the manufacturing process