Often, a workstation products different references. For example it can produce parts A, B, C and D. The main problem in this case is to choose the type of parts to be manufactured first.
For this we use the Kanban board.
Suppose we have the same number of labels to be produced for items A, B, C and D.
The number of Kanban is identical for each reference. It is therefore difficult to define a priority.
We must know the number of kanban in the loop for each reference. Suppose we have: 10A, 5B, 3C, 6D.
This means we currently have in stock:
10 – 3 = 7A
5 – 3 = 2B
3 – 3 = 0C
6 – 3 = 4D
It is therefore urgent to launch pieces C.
But to prevent the operator performs this calculation every time, we will use a visual board, in the following example.
Red zone: It is urgent to produce
Orange Zone: normal wait time without risk of breaking
Green Zone: This corresponds to the buffer stock – No emergency