These two arrangements are constantly confused although they answer different questions. Vendor-managed inventory hands the supplier the decision to replenish, based on the client’s actual consumption. Consignment transfers to the supplier the ownership of stock until it is consumed. You can have either without the other, and only the first genuinely improves how the chain is steered.
Why it matters
Few topics in this domain are as systematically mixed up. In most discussions, vendor-managed inventory and consignment are used as synonyms, when they act on entirely different levers. One changes who takes the replenishment decision, the other changes who carries the stock on their balance sheet. These are independent dimensions, and the signature crosses them deliberately to make that independence obvious.
Vendor-managed inventory moves the decision upstream. The supplier receives actual consumption or stock levels at the client, and triggers replenishment itself within an agreed frame. The change is profound, because it removes a layer of interpretation: the supplier stops inferring demand from the orders placed on it, and simply sees it.
Consignment moves ownership. Stock sits physically at the client but remains the supplier’s property until consumed. The client lightens its balance sheet and pays only on use. Nothing in this mechanism changes how quantities are decided, nor reduces the total quantity held across the chain.
The bar at the bottom of the signature carries the essential message. From one configuration to the next, capital changes sides, but the physical stock stays in exactly the same place and at the same level. A company negotiating consignment obtains a real and immediate accounting gain; it has optimised nothing at all.
This deserves to be stated plainly, because it shapes the negotiation. Consignment is a transfer of risk, not an improvement in performance. The supplier who accepts it now carries the capital and the obsolescence, and will price that in, immediately or at renewal. The client’s cash gain is real but partly recovered elsewhere.
Vendor-managed inventory follows a different logic. By giving the supplier visibility of final consumption, it attacks the structural cause of the amplification described on the order-up-to page. The supplier no longer needs to infer a signal distorted by its client’s policy, which reduces its own perceived variability, hence its buffers, hence its costs. That is a joint gain, not a transfer.
The expert lesson lies in the order of priorities. Negotiating consignment first places the relationship on distributive ground, where what one gains the other loses. Installing information sharing first creates new value the two parties can then split, and it makes consignment easier to obtain afterwards, since the supplier is taking far less risk.
The mechanism
Vendor-managed inventory rests entirely on the quality of the information flow. The supplier must receive, at a useful frequency, stock levels and actual withdrawals at the client. Weekly transmission of orders will not do: that is precisely the distorted signal you are trying to bypass. Without reliable consumption data, the arrangement is merely a transfer of administrative workload.
It then requires an explicit contractual frame, and this is where many agreements fail. The contract must set the bounds within which the supplier may decide, the minimum and maximum levels allowed, the service expected, and how responsibility is shared in the event of a stockout. A supplier given the decision without bounds or clear responsibility will optimise its own production.
Consignment demands almost nothing in information but a great deal in management discipline. What is consumed and when must be traced precisely, since that event triggers the transfer of ownership and the invoice. Edge cases must also be handled: breakage, expiry, obsolescence, missing inventory. These clauses look secondary at signature and become the heart of the matter two years later.
A final point, often discovered too late, concerns accounting treatment. Depending on the contract terms, notably the effective transfer of risk, consigned stock may or may not leave the client’s balance sheet. Having the arrangement validated by the accounting function before negotiating avoids building a whole business case on a gain that will not materialise.
The traps
Taking stock off your balance sheet produces an immediate accounting gain and zero operational gain. The quantity held in the chain is unchanged, the supplier bears the cost and will pass it on. Presenting consignment as a stock reduction is an analytical error that gets paid for at contract renewal.
Handing replenishment to a supplier that only sees the orders it receives, with no contractual floor or ceiling, merely moves the problem one step. The arrangement is worth only the visibility of real consumption and a written decision frame.
Obsolescence, breakage, inventory discrepancies, exiting the contract: these look marginal at signature and later concentrate most of the disputes. Who carries consigned stock that has become unsellable is a question to settle before, not after.
The rollout
Decide explicitly, and separately, who steers replenishment and who carries the stock. Treating them together leads to mistaking an accounting gain for an operational one.
Send the supplier actual withdrawals and stock levels before any discussion of ownership. That flow, and it alone, creates new value to share.
Set minimum and maximum levels, expected service and responsibility on stockouts in the contract. Without bounds, delegation becomes abdication.
Check with the accounting function, before negotiating, that the intended terms genuinely produce the expected removal from the balance sheet. Many cases rest on an unconfirmed gain.
Rule in advance on obsolescence, breakage, inventory discrepancies and exit conditions. These clauses determine the real value of the arrangement far more than the rate negotiated.
Neighboring concepts
From knowledge to action
The accounting gain is immediate, the operational gain comes only from information sharing. Our Inventory & distribution file separates the two and builds the negotiation sequence that creates value.