When 3D scans are used in designing a part, the accurate data makes it possible to utilize precise measurements of the physical product reducing the process by a huge percentage. The scanning is also combined with prototyping so that physical objects are scaled accurately.
It is among the areas that have greatly benefited from 3D scanning. They scans are applied starting with physical object and then using this to create a CAD model. Mating parts are also scanned and then incorporated into a given design so the end result is better fitting parts that are consistent.