Vendor Central Forecasting and Inventory Planning

Understand the order pattern

Amazon generates purchase orders from its own forecasts and inventory levels. Review history to understand typical order sizes, frequency and seasonality for each product. Patterns can change when Amazon updates its forecasts or when you run promotions.

Use Amazon forecasts wisely

Where Amazon provides demand forecasts, use them as one input alongside your own sales trends, marketing plans and market knowledge. Forecasts are estimates and can be revised, so avoid committing production solely on their basis.

Know your lead times

Map your lead times from raw materials through production, quality checks, packing and transit to Amazon receiving locations. Add buffers for known variability. If your total lead time is longer than the notice Amazon gives, you need stock in advance.

Set safety stock

Safety stock covers the gap between expected and actual demand or delays. Base it on the variability of demand and lead time and the cost of a stockout versus excess. Review it each quarter and before peak seasons.

• Average demand per period
• Variation in demand
• Lead time and its variation
• Cost of stockouts versus holding

Monitor fill rate and availability

Track how much of each purchase order you deliver in full and on time, and how often products are unavailable at Amazon. Low fill rates can harm your relationship and reduce future orders. Investigate causes such as production constraints or inaccurate acknowledgments.

Communicate with your vendor manager

Share planned promotions, new product launches and supply constraints early. Ask about forecast assumptions and any category changes. Good communication helps align Amazon's orders with your capacity.

Review and adapt

Compare actual orders to forecasts monthly. Adjust production plans and safety stock where the gap is persistent. Document lessons from stockouts or excess so the next season benefits.

A worked example

A vendor sees that purchase orders for a product double every November. Their lead time is eight weeks, so they begin production in September using their own estimate of the increase, and agree with their vendor manager how Amazon's forecast compares. When orders arrive in line with the estimate, availability stays high.

In the following year they refine the estimate using actual data from the previous peak.

Common mistakes

Common mistakes include producing only against confirmed POs when lead times are long, ignoring seasonality and overbuilding because of an optimistic forecast. Track forecast accuracy by product so you know how much to trust each signal.

Your next three steps

Improve your planning against purchase orders.

• Map your total lead time for each product.
• Compare Amazon forecasts with your own estimates.
• Track fill rate and share capacity limits early.

Key terms

A few terms used above, in plain language.

• Forecast: an estimate of future demand.
• Fill rate: the share of a purchase order delivered.
• Safety stock: a buffer against uncertainty.