Supplier Kanban
Is Supplier Kanban the same as a purchase order?
No. It is a replenishment authorization signal that may generate or reference an external procurement action, but its operational logic is pull-based and container-driven rather than requisition-driven.
What data is usually encoded in a Supplier Kanban signal?
Typical fields include vendor or supplier ID, part number, container or bin ID, pack size, required quantity, lead time, and sometimes status such as open, in transit, or shipped.
What makes it 'supplier' rather than internal Kanban?
The replenishment authority crosses the plant boundary: the demand signal is sent to an external supplier instead of an internal upstream process or warehouse.
Supplier Kanban is a consumption-driven external replenishment signal that authorizes a supplier to ship a specific part quantity when a container, bin, or card reaches a trigger condition. It extends the internal pull loop beyond the plant boundary, using physical cards, eKanban, RFID, or supplier portals to replace forecast-based replenishment and manual expediting.
On a manufacturing shop floor, Supplier Kanban is tied to a containerized part, supermarket location, or line-side bin. When the last container is opened or emptied, the card or electronic signal is sent to the supplier as an authorized request. In SAP SNC, the back-end system sends a Kanban request to the collaboration platform, where both customer and supplier monitor status and quantities in a control cycle. Oracle's portal shows suppliers viewing cards, printing them for shipment attachment, and marking them In Transit, creating closed-loop visibility. In raw-material warehousing, the signal maintains a predefined bin quantity aligned to consumption and lead time, so replenishment is triggered by actual usage rather than a purchase requisition backlog. The result is faster replenishment, lower throughput time, and tighter delivery reliability because the supplier receives a direct, standardized demand signal instead of an ambiguous exception.
Trigger mis-sizing: When bin quantity, card count, or lead-time coverage is set too low, the supplier signal arrives late and the line stops for parts. Set too high, pull discipline collapses and avoidable inventory accumulates.
Poor supplier visibility: If the supplier cannot see card status, shipment priority, or due quantities in real time, cards sit unprocessed, shipments get mislabeled, and in-transit status stays stale, causing receiving delays and false shortages.
Weak control-cycle configuration: Incorrect external procurement setup, replenishment strategy, or scheduling-agreement linkage routes the signal to the wrong path or blocks execution entirely, making the kanban loop unreliable despite correct consumption signals.