Supply Chain & Procurement calculator
Vendor Managed Inventory Days Calculator
Estimate VMI coverage from vendor stock, daily usage, and policy factor. On-hand divided by daily usage, then divided by safety multiplier, gives a protected days of supply.
What this calculator does
- Estimate VMI coverage from vendor stock, daily usage, and policy factor.
- Use it when vendor managed inventory days in supply chain and procurement is being sized for a buffer or safety stock review.
- Turns inventory on hand, daily usage, safety factor into a protected days of supply for vendor managed inventory days in supply chain and procurement.
Formula used
- Protected days = inventory on hand ÷ daily usage ÷ safety multiplier
Inputs explained
- Inventory on hand: undefined
- Daily usage: undefined
- Safety factor: undefined
How to use the result
- Use it when vendor managed inventory days in supply chain and procurement is being reviewed for stockout risk.
- Lead time variability and supplier reliability are not in the formula. Adjust safety multiplier to compensate.
Common questions
- What problem does this vendor managed inventory days calculator solve? Estimate VMI coverage from vendor stock, daily usage, and policy factor. You get a protected days of supply you can defend before quoting, scheduling, or sign-off.
- Where do I get the inputs for this supply chain and procurement calculator? inventory on hand, daily usage, safety factor usually move the protected days of supply most. Pull from measured supply chain and procurement runs, supplier data, and recent quotes rather than memory.
- How should I act on the output? Use protected days to set the next reorder point or buffer level for supply chain and procurement.
- What should I double-check before acting? Confirm daily usage is a real recent average, not a quarterly mean that hides a spike.
Last reviewed 2026-05-12.