Engineering Drawing vs. Production Drawing Engineering Drawing is what most of us have learnt during the preliminary years of engineering - Isometric drawings to orthographic projection and vice versa. A small example of such practice can be: But these drawings are incomplete not very useful during the actual manufacturing of the desired part. During production, a lot of additional information needs to be given to the manufacturer. For example: i. the allowable amount of deviation from actual dimensions or geometry, ii. The standard dimensions and number of holes (if any), iii. Information on threading- in...