Not all the industrial processes required to create a final product can usually be enacted in the same physical place. In fact, a hierarchy of industries (often called supply chain) can be built for most industrial outputs. For example, different industries, ranging from iron ore mining that extracts the raw materials to car assembly, through many intermediate processing industries, such as the metallurgy or machine tool industries, are necessary to produce a car. As a result, the distribution of goods has a major impact on the correct operation of a factory or group of factories by transporting materials, workpieces and final goods.