Kanban: the old and the newProvides an overview of Kanban, the classic signalling device for production pull systems. Kanban has been around for many years and is well established in a large number of companies. It is the classic signalling device for production pull systems. Nevertheless there remain uncertainties about types and quantities. For a few, kanban is still a new concept. Others may have decided that pull systems are not for them; they should think again in the light of new types of pull system. This article attempts a summary of the old and the new.