Quick answer
To forecast inventory for a Walmart launch, size the initial fill to the purchase order across all stores, forecast weekly sell-through per store to project replenishment, back out manufacturing and shipping lead times to place production early enough, and tie the whole plan to cash. The goal is to fulfill without over-producing before sell-through is proven.
Step 1: Size the initial fill
Start with the opening order: units per store times the number of doors, plus any distribution-center requirements. This is the non-negotiable quantity you must have on hand to fulfill the PO. Getting the fill wrong risks the relationship before the launch even starts.
Step 2: Forecast sell-through per store per week
Replenishment is driven by how fast product moves off the shelf. Estimate weekly units per store from comparable products, category benchmarks, and any test data, then project the reorder cadence. Be conservative on the first reorder until real sell-through data arrives.
| Input | Why it matters |
|---|---|
| Doors (store count) | Scales the initial fill |
| Units per store per week | Drives replenishment |
| Lead time | Sets how early to produce |
| Safety stock | Buffers demand and supply variability |
Step 3: Back out lead times
Walmart expects reliable fulfillment, so production must be placed early enough to cover manufacturing and shipping. Work backward from the launch date and the first expected reorder to schedule POs, adding buffer for the variability that always appears.
Step 4: Tie it to cash and reforecast
- Fund the fill. Confirm cash to produce the initial order before Walmart pays.
- Watch sell-through. Adjust replenishment forecasts as real data lands.
- Avoid the over-buy. Do not scale production to the opening PO until sell-through proves out.
Rule of thumb. Produce confidently for the initial fill; produce cautiously for reorders until sell-through is real. Over-producing on the strength of one big PO is the classic launch mistake.
Where Drivepoint fits. Drivepoint connects launch demand, inventory, and cash in one live model, so you can size the fill, project replenishment from sell-through, and see the cash requirement before you commit production.