There is a tiler who lives in a region that houses engineers of companies like Audi and Siemens. Apparently these folks take their habit of being so extremely strict, the same habit that is the base for Germany's economic success and that creates high quality cars and other products, to their homes too. It ends up in requirements are so unrealistic that this tiler ended up not accepting requests from the employees of these two companies.

German source: https://www.donaukurier.de/archiv/audi-ingenieure-unerwuensc...