Vendor Managed Inventory
Also: VMI, Vendor-Managed Inventory, lieferantengesteuerter Bestand, lieferantengesteuerte Disposition, Lieferant steuert Bestände
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Vendor Managed Inventory (VMI) is a cooperative model in which the supplier takes over inventory management at the customer's site and is independently responsible for replenishment. The customer provides consumption and stock data and defines binding framework values such as minimum and maximum stock levels.
Key facts
- In VMI, the supplier takes over replenishment responsibility for agreed items and triggers replenishments independently.
- VMI and consignment warehousing are not the same: VMI describes the control model, consignment describes the ownership model – both can be combined or used separately.
- Data quality on the customer's side is the most critical success factor, because the supplier can only plan replenishment on the basis of the stock and consumption data provided.
- Transfer of ownership, liability, service level penalties, and pricing logic must be unambiguously defined in the contract before VMI goes live.
What is Vendor Managed Inventory?
In Vendor Managed Inventory – VMI for short – a company transfers the replenishment responsibility for certain items to its supplier. Instead of placing orders itself, the customer regularly provides the supplier with stock and consumption data. The supplier evaluates this data, decides on the timing and quantity of replenishment, and adheres to agreed framework values – typically minimum stock, maximum stock, delivery intervals, and service levels. The replenishment task thus changes sides, without the customer losing control over the agreed framework conditions.
How does VMI work in practice?
The technical foundation is a regulated data exchange, often via EDI messages, vendor portals, or direct ERP interfaces. The supplier receives current inventory levels and outgoing quantities at defined intervals – daily, hourly, or in real time. On this basis, it plans production or picking quantities and triggers deliveries before a critical shortfall occurs.
In practice, there are two key ownership models that should be clearly distinguished:
- VMI without consignment: Ownership of the stock transfers to the customer upon delivery. The supplier only takes over the replenishment function.
- VMI with consignment: The supplier remains the owner of the goods until they are withdrawn. Payment is only triggered upon consumption. This model ties up less capital on the customer's side, but requires clear regulations regarding liability, shrinkage, and inventory counting.
Both variants can be combined, but must be treated differently from a contractual and accounting perspective.
What matters when implementing VMI?
The success of VMI stands or falls with data quality. Incorrect or delayed inventory data leads to incorrect deliveries, excess stock, or shortages – and formal responsibility lies with the supplier, who can only act on the basis of the information provided. Clear rules on data transmission, posting currency, and error correction are therefore mandatory.
Equally important are contractual provisions on the following points: Who bears the risk in the event of damage or shrinkage in the customer's warehouse? How are service level violations assessed and penalized? How does the pricing logic behave in the event of market price fluctuations during the consignment period? These questions are resolved differently depending on the vendor and industry – there is no uniform market standard.
For warehouse planning and IT, VMI also means that goods receipt processes need to be adapted: deliveries no longer arrive on the basis of the customer's own orders, but on the supplier's initiative. This requires appropriate advance shipping notification processes and clear assignment within the warehouse management system.
Related terms
- Avisierung
Pre-advice refers to the advance notification of a delivery by the supplier to the recipient before the goods arrive. It enables the warehouse to plan staffing, dock capacity, and put-away processes in a timely manner.
- Bedarfsplanung
Demand planning refers to the systematic process by which a company determines what quantities of materials, goods, or resources are needed and when. It forms the foundation for inventory management, procurement, and warehouse planning.
- Beschaffungslogistik
Procurement logistics encompasses all logistical processes that manage the flow of materials from suppliers through to handover at the warehouse or production facility. It connects purchasing, transportation, and goods receipt into a seamless inbound process.
- Beschaffungsplanung
Procurement planning refers to the process by which a company systematically determines which materials or goods need to be sourced, in what quantities, at what time, and from which suppliers.
- Bestandscontrolling
Inventory controlling refers to the systematic monitoring, analysis, and management of stock levels using defined key performance indicators. It connects logistics and procurement to reduce tied-up capital and ensure delivery capability.
- Bestandsführung
Inventory management refers to the system-supported administration and continuous updating of all warehouse and material stocks within a company. It forms the basis for planning, procurement and accounting – and ensures that the book inventory and physical inventory are in agreement at all times.
- Bestandsmanagement
Inventory management refers to the systematic planning, control, and monitoring of stock levels across the entire supply chain. The goal is to ensure delivery capability while keeping capital commitment and warehousing costs within economically viable limits.
- Bestellpunktverfahren
The reorder point method is a replenishment procedure in which an order is automatically triggered as soon as the current stock level falls below a predefined reorder point.
- DESADV
DESADV (Dispatch Advice) is a standardized EDI message in EDIFACT format that electronically announces an upcoming delivery. It transmits structured information on packaging units, items, quantities, and identifiers such as the SSCC to the goods recipient.
- Disposition
Disposition refers to the operational planning and control of resources, quantities, and orders in logistics – for example in transport or materials disposition. It encompasses capacity assignment, scheduling, prioritization, and response to disruptions.
- Konsignationslager
A consignment warehouse is a stock held at the customer's site where goods are physically stored at the buyer's premises but remain the legal property of the supplier until they are withdrawn or consumed. Invoicing only takes place at the time of actual withdrawal.