Use the Kanban and Supermarket Sizing form to quantify the number of kanban containers and the maximum inventory.
Single Unit is the most common and traditional kanban system.
Kanban Type | Description |
---|---|
Single Unit | Each container (of a fixed size) has a kanban (for example, a card). When the container is removed from the supermarket, the kanban is removed and returned to the supplier operation to signal the need to produce an additional kanban quantity. This is the most common system. |
Two Bin | Two bins, or containers, are used. Each container (of a fixed size) contains a quantity equal to the production demand rate multiplied by the replenishment time (optionally modified by a safety factor). When a container is empty, it is returned to the supplier operation to signal the need to replenish it.
NoteBecause there are only two containers in this system, the maximum inventory is twice the container quantity. |
Multi-bin | This is similar to the two bin system because reordering is based on a certain level of inventory, instead of individual container kanban. However, unlike the two bin system, containers can be of any constant size smaller than the reorder quantity. The reorder point specifies the number of containers to reorder. |
The calculations used in the kanban and supermarket sizing tool are displayed in the table:
Kanban Type | Calculation | Formula |
---|---|---|
Single Unit | Supermarket Size (units) | Demand Rate * Replenishment Time * (1 + Safety Stock) (Rounded up to the next integer) |
Supermarket Size (containers) | Supermarket Size (units) / Container Size (units) (Rounded up to the next integer) | |
Number of kanban cards in supermarket | Equal to Supermarket Size (containers) | |
Two Bin | Number of units in bin | Demand Rate * Replenishment Time * (1 + Safety Stock) (Rounded up to the next integer) |
Number of bins | 2 | |
Total number of units in supermarket | 2 * (Number of units in bin) | |
Multi-bin | Trigger Point (units) | Demand Rate * Replenishment Time * (1 + Safety Stock) (Rounded up to the next integer) |
Trigger Point (containers) | Supermarket Size (units) / Container Size (units) (Rounded up to the next integer) | |
Total number of containers in supermarket | 2 * Trigger Point (containers) |
For more information, go to Insert and fill out a form.