The difference between VMI and CMI comes down to one question: who places the replenishment order. In vendor managed inventory (VMI) the supplier monitors stock and orders on the customer’s behalf. In co-managed inventory (CMI) the customer keeps final control of ordering, while the supplier shares data and recommendations. Both rely on shared visibility — they differ in who holds the decision.
VMI vs CMI at a glance
| VMI (vendor managed) | CMI (co-managed) | |
|---|---|---|
| Who places the order | Supplier / distributor | Customer |
| Who owns the data | Shared, supplier-driven | Shared, customer-driven |
| Customer effort | Low — hands-off | Medium — keeps final say |
| Best when | Trust is high and the supplier knows demand well | The customer wants control or demand is volatile |
What is CMI?
Co-managed inventory (CMI) is a middle ground between fully manual purchasing and full VMI. The supplier still provides forecasts, usage reports, and suggested orders, but the customer reviews and approves each replenishment. It suits organisations that want the visibility benefits of VMI while retaining authority over spend.
Which model should you choose?
- Choose VMI for stable, high-frequency items — MRO consumables, fasteners, PPE — where hands-off replenishment saves the most time and the supplier understands demand.
- Choose CMI for higher-value or volatile items where the customer wants to approve each order, or during the early trust-building phase of a supplier relationship.
- Run both. Many programs start as CMI and graduate individual item groups to VMI as confidence and data quality grow.
Whichever model you pick, the foundation is the same: accurate, real-time consumption data both sides can trust. That is where a shared platform matters more than the label on the program.
How Invendor supports VMI and CMI
Invendor gives buyer and vendor one live view of the same stock, with consumption captured automatically at the point of use. Replenishment can be fully vendor-driven (VMI) or set to suggest-and-approve (CMI) per item group, so you can mix models in one program. Learn more on the vendor managed inventory software page, or start with what is VMI.
Frequently asked questions
Is CMI the same as VMI?
No. Both share data between customer and supplier, but in VMI the supplier places the order, while in CMI the customer keeps final approval over ordering.
Does CMI or VMI require consignment stock?
Neither requires it. Consignment is a separate commercial choice about ownership and billing that can apply to either model. See VMI vs consignment inventory.
