ABSTRACT
I mentioned various techniques for tolerance analysis in Chapter 7 with an indication that more details would be found here in this chapter.
In the early days of modern engineering, there were two groups of people responsible for developing the detailed engineering drawings-the so-called blue prints. The rst group was the engineers responsible for the design of the product from the concept down to each component. Once the design was on paper, it was handed over to the second group often referred to as draftsmen. This second group was responsible for nishing the design by providing specications for the required hardware (such as screws, nuts, bolts, etc.), specifying tolerances on nominal dimensions provided by engineers, and creating the physical 2D drawings. It was not uncommon that an engineer-in-training spend time working as a draftsman and learning from the old-timers.
