Out of the loop here can you give me tldr on this?
dohju
joined 1 year ago
If you can even get something like +/-3 or 4 mm with say a cpk of 1,33 you are doing pretty well for a whole body.
It's probably a pr stunt. If this is real then they are doomed because they have not yet understood that you need to compensate tolerances and design a robust assembly that can handle this. If you are trying to get crazy high part precision you have not understood how big scale manufacturing works. This is why the Japanese are often so highly regarded in this and might be the true art of car (or large scale) engineering.
https://www.southpark.de/videoclip/m31v1z/south-park-it-s-called-shitter
Here is a 20 minute infomercial that kind of covers it 😃
Worked for a car manufacturer doing statistical analysis on gap & flushness all over the exterior... And the door gaps are a bitch to get right. Probably the most difficult ones over the whole car. All the manufacturers struggle with this to a degree. This is also the one place where part quality is probably most critical.
The other gaps are usually handled by designing the angles in a beneficial way etc. When they show up in a bigger way it's almost always bad design.