Vendor managed inventory (VMI) is an arrangement in which a supplier takes responsibility for agreed replenishment activities using visibility into a customer's stock or consumption. The parties define the covered items, stock limits, data access and decision authority.
VMI does not inherently eliminate purchase orders, buyer approval or price controls. It also does not determine who owns the stock. Those are separate process and agreement choices.
How VMI can work
The buyer shares the required inventory data. The supplier reviews replenishment needs and proposes or initiates supply within the agreed rules. The receiving team records actual deliveries, and finance follows the agreed invoicing and settlement process.
As a concrete software example, Oracle's VMI workflow can turn a supplier replenishment request into a requisition and then a purchase order against a blanket agreement. Its configuration also allows stock thresholds to be maintained by the supplier or enterprise. That disproves the idea that VMI always means shipping without a PO or giving the supplier unrestricted control.
The exact sequence varies. Ask each proposed provider to demonstrate its actual request, approval, order and receipt records.
VMI versus consignment
VMI concerns who manages replenishment. Consignment concerns inventory ownership and the agreed transfer or settlement event. They can be combined, but one does not imply the other.
For example, Oracle documents using VMI alongside consigned inventory. For your own arrangement, specify ownership, loss responsibility, returns, consumption reporting and settlement with the appropriate commercial and finance owners. Do not infer those terms from the VMI label.
A worked replenishment example
Assume a fictional retailer and packaging supplier agree a 40-carton minimum and a 100-carton target for one location. The current record shows 30 cartons on hand and 20 already confirmed inbound, with no other commitments in this simplified example.
If their policy compares the minimum with on-hand stock, the supplier may receive a replenishment signal. If the order-up-to calculation includes the existing inbound supply, the proposed quantity is:
100 target − 30 on hand − 20 inbound = 50 cartons
Ignoring the inbound order would propose 70 cartons and could duplicate 20 already committed. The parties should specify which stock basis triggers review and which quantities reduce the new request. A delivery arriving after the expected shortage requires a separate timing decision.
The buyer can still require approval for a price change, substitution or delivery above the agreed maximum. Show those exceptions during evaluation, rather than assuming either unlimited supplier authority or automatic buyer control.
Compare responsibilities, not labels
| Question | Supplier-managed arrangement | Buyer-managed purchasing |
|---|---|---|
| Who monitors replenishment? | Supplier within the agreed scope | Buyer team or its configured tools |
| Who sets limits? | As agreed between the parties | Buyer policy, subject to supplier constraints |
| Is a PO required? | Depends on the configured process | Commonly a buyer-created commitment |
| Who approves a substitute? | Defined permission or exception rule | Defined buyer permission or approval rule |
| Who measures performance? | Agreed data and accountable owners | Buyer and supplier records reconciled as needed |
| What happens on failure? | Agreed fallback and escalation | Buyer workflow and supplier escalation |
VMI can cover selected relationships while the buyer manages other purchases. Neither model guarantees stock availability, transparent pricing or accurate inventory without the required records and controls.
Evaluate the commercial fit
There is no universal annual-spend threshold that proves VMI suitable or unsuitable for a small business. Compare the proposed operating cost and responsibilities:
- What data must be shared, how often, and with which access restrictions?
- Who maintains item, location and pack mappings?
- How are limits changed, and which changes need approval?
- What happens when stock data is stale or the supplier cannot deliver?
- How are shortages, excess deliveries, substitutions and price differences recorded?
- Can the buyer obtain the history and switch arrangements without losing visibility?
Use a supplier scorecard with agreed definitions and a common evidence set. A supplier-managed process can still be measured by the buyer; a buyer-managed process can still contain poor data.
Where LineNow fits
LineNow's procurement workflow supports a buyer-led process connecting purchasing, supplier replies, receiving and the accounting handoff. Evaluate it when the team wants to review commitments across recurring supplier orders.
That positioning does not establish a complete supplier-operated VMI portal or consignment-settlement implementation. If you need VMI, bring the replenishment authority, required documents, stock-sharing rules and settlement process to the evaluation. Demonstrate the supported workflow before choosing which party should operate it.