A Just-in-Time technique developed in Japan at the Toyota Corporation in which a work centre or department uses a visible card, token or other signal (kanban) to pull material from a feeder work centre or supply location. It often uses a standard container with a card attached that is pulled when the container is moved by the using work center; after removal the card is used by the feeder work centre as authorization for more production. A basic premise is that no production takes place until authorised by the using department. A two card system uses both a production card, which authorises the manufacture of a standard container, and a move card which authorises the transfer of a container from one work centre to the next.