SMED (Single Minute Exchange of Die) is an issue relating to techniques and tools to shorten the changeover time of machines, devices and production processes. The main goal of SMED is to carry out each changeover in a unit number of minutes (less than 10) and to simplify the entire production process in such a way that the changeovers are performed safely according to established standards and in the shortest possible time. The originator of this concept is Shigeo Shingo.