Material balance planning was the type of economic planning employed by Soviet-type economies. This system emerged in a haphazard manner during the collectivisation drive under Joseph Stalin and emphasized rapid growth and industrialization over efficiency. Eventually, this method became an established part of the Soviet conception of socialism in the post-war period and other socialist states emulated it in the latter half of the 20th century. Material balancing involves a planning agency (Gosplan in the case of the Soviet Union) taking a survey of available inputs and raw materials and using a balance-sheet to balance them with output targets specified by industry, thereby achieving a balance of supply and demand.