Over the 12 month period shown, production levels varied between 550 and 700 units per month while average monthly sales were 300 units. The cycle time for production was 8 weeks on average with a minimum of 4 weeks and a maximum of 1.5 weeks for safety stock replenishment. Inventory levels fluctuated between meeting maximum monthly sales of 700 units and the minimum re-order point of 350-400 units plus the 150 unit safety stock level.

1. Item: 18779
Qty. Qty.
700 x Production x Production x Production x Production x 700
650 650
600 600
550 x 550
500 x 500
450 x x 450
400 x 400
Kanban card 350 350
300 x x x x x x 300
250 sales x sales 250
200 x x x x 200
150 x x 150
100 buffer buffer buffer buffer x buffer 100
50 50
0 0
Jan. Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Inventory level
Production
Cycle time: 8 weeks Avg. Sales: 300
Monthly Sales Max.: 700 8 weeks
Min.: 350-400 4 weeks
Safety: 150 1.5 weeks
Inventory vs. Sales - Rolling 12 months

2. Max.
Min./Re-order
Safety Stock