Eli5: On a production line, how do they make a car, plane or anything else be identical from one another without differences?

Question

Eli5: On a production line, how do they make a car, plane or anything else be identical from one another without differences?

In: 6

Answer 1

Like others have said, they are not identical, but have tolerance requirements that must be met. I work in the aviation field and a lot of our tolerances are measured in increments of one ten thousandth of an inch.