Behind the Scenes at an Amazon FC: How Inbound Inventory & Trans-Shipping Really Work

Our team recently toured an Amazon Fulfillment Center in Arizona to get a firsthand look at what actually happens to inventory after it leaves your warehouse loading dock. This kind of on-the-ground experience allows us to gain key perspective on how Amazon functions internally while staying up-to-date with their latest policies and requirements. The reality is that managing inventory isn't just about shipping boxes; it's about understanding how Amazon's internal network receives, scans, and balances stock across the country.

Here are some of our key takeaways from the visit:

1. The Overstock vs. Out-of-Stock Dilemma (Trans-Shipping)

• What Is Happening: Ever wonder why Amazon flags your brand as "overstocked" in one region while asking for more stock in another?

• How Amazon Handles It: To even out inventory across regional hubs, Amazon relies heavily on internal trans-shipping between Fulfillment Centers.

• Brand Takeaway: Alignment with Amazon’s distribution algorithms requires predictable, consistent inbound scheduling so trans-shipping routes can operate efficiently without spiking your inventory hold times.

  
  

2. Pallets, Layers, Cases, and "Eaches": How Receiving Actually Works

• What Is Happening: If your product line relies heavily on mixed pallets or individual loose items ("eaches"), receiving takes significantly longer, increasing the risk of receiving errors or lost units.

• How Amazon Handles It: High-speed FCs optimize receiving at the pallet layer level, focusing on cases and multi-packs rather than individual loose items.

• Brand Takeaway: Amazon is increasingly leaning on automated high-speed scanners at inbound gates. Standardized barcode placement, predictable case-pack configurations, and clean pallet building are critical for fast check-ins.

  
  

3. Understanding Shipping Errors and Chargebacks

• What Is Happening: Chargebacks and other negative feedback can be confusing, especially understanding root causes and how to address the problem for future shipments.

• How Amazon Handles It: Amazon is introducing new reporting metrics in Vendor Central to more accurately track the results and root causes of shipping and receiving errors and chargebacks.

• Brand Takeaway: Use all the available data in Vendor Central’s chargebacks and ___ portals, as well as their training documents and published guidelines, to ensure compliance and track performance over time.

At the end of the day, true expertise isn't built behind a screen. We love getting out into the field to experience operations firsthand, bringing those insights back to our partners so we can learn, adapt, and succeed together.