There is no separate code for military production in industrial statistics, but it is merely included in the industrial sector to which it belongs, without any possibility to distinguish it from civil production. Such estimates are made by ministries and by defence industry associations in some countries. On the company level, there is no obligation to report arms sales in company annual reports and few companies do so. Some arms-producing companies have a defence division and provide separate data for the sales of this division. Some companies provide their estimates of the military share in their total turnover, revenues or sales.
Some companies provide data on their sales to the defence ministry or sales to the government.
Arms production Available data on arms production have a low degree of comparability because there is no generally agreed definition of arms production. Neither is it self-evident what arms production should include. There is a broad range of possible definitions, depending on the purpose of the data and the feasibility of measurement. First, there is a choice whether to include the production only of military goods or also of services and technology. Second is the choice of what kind of products to include.