Enter Shipment Planning Inputs
Example Data Table
| Scenario | Daily Demand | Lead Time | On Order | Safety Stock | Recommended Shipment |
|---|---|---|---|---|---|
| Imported electronics | 1,200 units | 14 days | 6,200 units | 4,048 units | 5,100 units |
| Bulk packaging film | 850 units | 11 days | 3,400 units | 2,288 units | 2,900 units |
| Medical supply lanes | 430 units | 21 days | 5,100 units | 1,910 units | 1,400 units |
Formula Used
Base pipeline inventory = Average daily demand × Lead time days
Combined variability = sqrt[(Lead time × Daily demand standard deviation²) + (Average daily demand² × Lead time standard deviation²)]
Safety stock = Z-score × Combined variability
Reorder point = Base pipeline inventory + Safety stock
Target stock level = Reorder point + (Average daily demand × Review period days)
Inventory position = On hand inventory + On order inventory - Backorders
Recommended shipment = max(0, Target stock level - Inventory position)
Rounded shipment = Next whole batch above the recommended shipment
Pipeline inventory value = Base pipeline inventory × Unit cost
How to Use This Calculator
Enter your average daily demand first. This reflects the normal outbound requirement per day across the lane, product family, or distribution flow.
Add the average lead time in days. Include supplier processing, port dwell, transit movement, customs delay, inland transfer, and receiving time.
Fill in the demand and lead time standard deviations if variability matters. These fields improve safety stock and reorder point accuracy.
Select the service level that matches your fulfillment target. Higher service levels raise safety stock and reduce stockout risk.
Include unit cost, current on hand units, committed on order units, backorders, and your preferred shipment batch size.
Press the calculate button. The result block appears above the form and shows transit exposure, inventory gap, suggested shipment, and value.
Frequently Asked Questions
1. What is pipeline inventory?
Pipeline inventory is stock currently moving through procurement or transit. It covers goods not yet received but already committed to satisfy future demand.
2. Why does lead time matter so much?
Longer lead times increase the units tied up in transit. They also magnify uncertainty, which raises safety stock requirements and reorder points.
3. What does service level change?
Service level changes the Z-score used for safety stock. Higher targets increase protection against shortages but also raise carrying cost and capital usage.
4. Should I include backorders?
Yes. Backorders reduce true inventory position because those units are already promised. Including them prevents understating replenishment urgency.
5. What is inventory position?
Inventory position combines on hand stock and on order stock, then subtracts backorders. It shows the practical amount available for future demand.
6. Why round shipment quantity?
Many shipments must follow carton, pallet, container, or production batch limits. Rounding converts the theoretical recommendation into an operational order quantity.
7. Can this help with global shipping lanes?
Yes. It is useful for international lanes, domestic transfers, supplier replenishment, and multi-step distribution flows where transit time drives stock exposure.
8. Is pipeline inventory the same as safety stock?
No. Pipeline inventory covers expected demand during transit. Safety stock is the extra buffer held for uncertainty in demand and lead time.