Further kanban

摘要

The dual-card kanban (also known as the Toyota system) employs two kanban cards: one for the supplier process, also known as the production kanban or P-kanban; and one for the customer process, also known as the conveyance kanban, or C-kanban. These are most useful in complex flexible systems. The sequence of actions is shown in the following diagrams. Figure 1 shows how, at an assembly (or customer process) point, when the parts being used (often being assembled with other parts) go below a certain point that is defined by the kanban card, the card is placed out for the materials handler, who goes on a circular route from the stock point to the assembly point, replenishing parts as needed.