What is vendor managed inventory?
In a VMI arrangement, the supplier takes over the ordering decisions a buyer would normally make. The buyer shares live sales and stock data, and the supplier uses it to keep products replenished before they run out. This flips the traditional model, where the buyer watches its own shelves and sends purchase orders (POs) upstream.
The setup exists to fix a costly problem: uncoordinated ordering. When a buyer and supplier work from separate forecasts, stockouts and overstocks build up on both sides.
The IHL Group’s 2026 Inventory Distortion Study measured $1.7 trillion inventory distortion worldwide, counting out-of-stocks and overstocks, equal to 6.2% of global retail sales. VMI narrows that gap by running on shared, real-time inventory visibility rather than two competing guesses.
VMI goes by a few other names. The Chartered Institute of Procurement and Supply notes the agreement is also known as managed inventory, a continuous replenishment program, or supplier-assisted inventory replenishment. From the buyer’s point of view, it is also called supplier-managed inventory.
Key characteristics
The details vary by contract, but a few traits stay consistent. U.S. federal procurement rules reflect the core idea: “Vendor Managed Inventory (VMI)” is used to characterize various programs in which Government-owned property is managed by the contractor.
- Supplier owns replenishment decisions: the vendor sets order size and timing, not the buyer.
- Runs on shared data: the buyer sends sales and stock data to the supplier, often through an automated feed.
- Agreed minimum and maximum levels: the supplier keeps stock between preset floors and ceilings so shelves stay full without piling up.
- Ownership usually transfers at delivery: unlike consignment, the buyer typically takes title when goods arrive, even though the supplier still manages replenishment.
- Lower buffer stock and admin work for buyers: buyers can hold less reserve stock and skip manual purchase-order cycles.
Fishbowl’s auto purchasing feature generates purchase orders when part quantities get low, the buyer-side counterpart to VMI-style replenishment. Source: Fishbowl Auto Purchasing.
Example
A familiar illustration is a big retailer like Walmart and a supplier like Procter & Gamble (P&G). P&G tracks Walmart’s store sales data for products such as laundry detergent and decides when to ship more. Shelves refill without Walmart cutting a purchase order for each restock.
The same pattern shows up wherever a supplier and buyer are willing to share data and coordinate closely. Every arrangement still rests on one thing: the supplier and buyer working from the same numbers. That is why teams tighten how they manage vendor relationships and share data before handing off replenishment.
Related terms
FAQ
Who owns the inventory in vendor managed inventory? Ownership depends on the agreement, but in most VMI setups the buyer takes ownership when goods are delivered while the supplier still manages replenishment. If the supplier keeps ownership until the item sells, that is consignment.
What is the difference between VMI and consignment inventory? VMI is about who controls replenishment, while consignment is about who owns the stock. The two are independent and are sometimes combined in the same agreement.
What is the purpose of vendor managed inventory? The purpose is to keep the right products in stock while cutting stockouts, overstock, and ordering work, by letting the supplier manage replenishment from shared data.