In economics, economies of scale means that when more units of a product are made at the same time, the cost it takes to produce a single unit will go down. When making a product, there is a maximum capacity that can be made, at a given time. This capacity depends on the ways in which the product is made. If it is made by machines, these machines have a maximum number they can produce. Wanting to produce more than this number means new machines (or a new way to make these products) are needed. Adam Smith first had this idea of economy of scale, which he obtained through division of labour. 