This books provides an introduction to Geometrical Product Specifications (GPS), the global language for specifying requirements for the geometry of components. Through easy-to-understand color illustrations and specific examples, it guides the reader through the basic rules for interpreting the graphic GPS language and provides a step-by-step procedure for tolerancing your components and products using GPS. The books also shows how everyone involved in product realization, from idea conception to manufacturing and verification, can benefit from the use of GPS. This because GPS tolerances can express functional requirements more precisely and therefore be made larger, so that components become less expensive tp produce.