On 07/14/2017 03:14 PM, Tekkie® wrote:
I knew a guy whom worked at a major tire manufacturer in quality control.
After GM started to reject boxcars of tires, they started loading the
exceptional spec tires at the doors of the boxcars after loading the usual
spec'd tires in first. The GM inspectors would only check the first out lot
then move on.

When I took statistics years ago it was geared toward engineers. The
major question was how many samples do you have to examine to ensure the
batch is only N% crap. N would be provided by sales and marketing after
they determined the economics of repairing or replacing crap versus
going for as close to 100% quality product as you could.