I picked this profession way before coming out of the closet. I thought I was going to be an architect once, I had all four years of drafting in high school. (Years later would discover my work is the basis of freemasonry). This subject probably sounds much boring to many gays here on RJ. As I have stated before, the S.T.E.M fields are still a bit too homophobic and any young, openly gay today contemplating this field should think twice, your lifestyle or your career. It certainly can be rewarding but troublesome if you are not prepared for your lifestyle backlash that comes with it, I wish it were different because Science is the shit
Well, this is definitely one huge difference between Boeing planes and Airbus planes
Knowing the metric system myself, I can tell you that tolerances during manufacturing and assembly are much tighter. A much tighter tolerance translates into a higher quality manufactured product.
Because the metric system produces higher quality products, it is more expensive to use in manufacturing which might explain why, 1)European manufacturing is better and more expensive than American 2) US corporate American manufacturing are profit driven only and therefore, using the English unit measurement, relies less on quality, less on price and more on simplicity and the ability to cut corners when necessary 3) The decline and movement of US manufacturing jobs-base to Europe and Mexico as America once relied upon it but can no longer compete with the ISO tighter tolerances and its expense.
As this is part of my work, the metric system applied tolerance is a bit different. Still used MIL-Standard is in a class by itself
English Engineering tolerancehttps://en.wikipedia.org/wiki/Engineering_tolerance
Metric Tolerance Definitionshttp://www.engineeringessentials.com/ege/tol/tol_page6.htm
United States Military Standardhttps://en.wikipedia.org/wiki/United_States_Military_Standard
For example, due to differences in dimensional tolerances, in World War II American screws, bolts, and nuts did not fit British equipment properly and were not fully interchangeable. Defense standards provide many benefits, such as minimizing the number of types of ammunition, ensuring compatibility of tools, and ensuring quality during production of military equipment. This results, for example, in ammunition and food cases that can be opened without tools; vehicle subsystems that can be quickly swapped into the place of damaged ones; and small arms and artillery that are less likely to find themselves with an excess of ammunition that does not fit and a lack of ammo that does.
However, the proliferation of standards also has some drawbacks. The main one is that they impose what is functionally equivalent to a regulatory burden upon the defense supply chain, both within the military and across its civilian suppliers. Almost nothing can be done according to sound case-by-case judgment, and almost everything requires constant, extensive study of the rules and verification that they are being followed "to a T". Workflows frequently pause (causing snowballing schedule delays) for reasons that are sometimes essentially trivial, and unit costs rise.