Specifying those tolerances was part of my job. It is not hard, it is simple arithmetic. Well, with some trig. I was amazed at the other engineers who would sim

Specifying those tolerances was part of my job. It is not hard, it is simple arithmetic. Well, with some trig. I was amazed at the other engineers who would simply pick "good engineering tolerance" and never do the arithmetic. Once my lead engineer noticed that I sized the jackscrew length with a tolerance of 30.017 to 30.033 (I'm making up the numbers, as I don't recall the exact numbers). He said why not make it a nice round 30.02 to 30.03? I said that if the jackscrew came in at 30.018, it wouldn't need to be rejected and sent to rework. He thought for a moment, and said "carry on". LOL