A Just-in-Time technique developed in Japan at the Toyota Corporation in which a work center or department uses a visible card, token or other signal (kanban) to pull material from a feeder work center 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 center as authorization for more production. A basic premise is that no production takes place until authorized by the using department. A two card system uses both a production card, which authorizes the manufacture of a standard container, and a move card which authorizes the transfer of a container from one work center to the next.