When Samsung established its ill-starred production plant in South Korea, they set it up with capacity to build 240,000 cars a year, but with the option to extend that to 500,000 if demand dictated. Outsiders understood that to mean that a second assembly line could be built on the site, but Renault have confirmed that all the plant needs in order to build half a million cars a year is a paint shop. The automotive industry is littered with examples of where production capacity being limited by the ability of the paint shop to cope.