In the late 1940s, Toyota was studying supermarkets with a view to applying some of their management techniques to their work. This interest came about because in a supermarket the customer can get what is needed at the time needed in the amount needed. Certainly, the supermarket only stocks what it believes it will sell. In addition, the customer only takes what they need because future supply is assured. As a result, this led Toyota to view earlier processes as a store. Therefore, the process goes to this store to get its needed components and the store then replenishes those components. It is the rate of this replenishment, which is controlled by Kanban, that gives the permission to produce.
Most importantly, this workshop presents the concept of Kanban and how it can be used to control items in a process. It demonstrates how Kanban is designed to supply what is required, when it is required.