Eli5: On a production line, how do they make a car, plane or anything else be identical from one another without differences?
In: 6
Quality control.
Each component is made to specifications, and if it doesn’t meet specification, it gets tossed/recycled.
For example, car needs a 50.00mm +/- 0.01mm rod in length, 10.00 +/- 0.01 mm in diameter. Worker makes 10 rods. Quality control checks them, finds that one rod is 50.05 mm long when max permissible is 50.01. Tosses it.
Why do you think it’s difficult to make them all nearly identical?
In an automated production line, it’s easier to make 100 pieces that are almost identical than 100 pieces that are all visibly different.
Everything is made by machines.
A machine is doing the same motions and using the same tools each time, so the end result is pretty much the same every time.
Why do you think it’s difficult to make them all nearly identical?
In an automated production line, it’s easier to make 100 pieces that are almost identical than 100 pieces that are all visibly different.
Everything is made by machines.
A machine is doing the same motions and using the same tools each time, so the end result is pretty much the same every time.
Quality control.
Each component is made to specifications, and if it doesn’t meet specification, it gets tossed/recycled.
For example, car needs a 50.00mm +/- 0.01mm rod in length, 10.00 +/- 0.01 mm in diameter. Worker makes 10 rods. Quality control checks them, finds that one rod is 50.05 mm long when max permissible is 50.01. Tosses it.
Quality control.
Each component is made to specifications, and if it doesn’t meet specification, it gets tossed/recycled.
For example, car needs a 50.00mm +/- 0.01mm rod in length, 10.00 +/- 0.01 mm in diameter. Worker makes 10 rods. Quality control checks them, finds that one rod is 50.05 mm long when max permissible is 50.01. Tosses it.
They don’t. They’re all slightly different, but mostly the same.
They specify that the components be made within a certain tolerance for dimensions and other properties. They are designed that as long as the parts are within those tolerance the composite machine will work as intended. You can replace any part with another part that meets the original specifications and it’ll work.
They don’t. They’re all slightly different, but mostly the same.
They specify that the components be made within a certain tolerance for dimensions and other properties. They are designed that as long as the parts are within those tolerance the composite machine will work as intended. You can replace any part with another part that meets the original specifications and it’ll work.
They don’t. They’re all slightly different, but mostly the same.
They specify that the components be made within a certain tolerance for dimensions and other properties. They are designed that as long as the parts are within those tolerance the composite machine will work as intended. You can replace any part with another part that meets the original specifications and it’ll work.
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.
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.
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