The book reviews factors affecting machining accuracy: basing mounting recalculation of dimensions and tolerances when mounting or measurement bases are changed methods of dimensioning in drawings. Methods and results set forth in this book may be used to design technology for parts machining in CAD/CAM software and to develop software for parts machining using CNC machines. This book will be beneficial to mechanical engineers: machinery designers process engineers researchers and mechanical engineering students if also can be used by university lecturers.