Fulfillment Center Performance Metrics Explained
24 December 2025
Selling on Online Marketplaces vs Own Store: Pros and Cons
24 December 2025
OUR GOAL
To provide an A-to-Z e-commerce logistics solution that would complete Amazon fulfillment network in the European Union.
How Amazon Decides Where to Store Your Inventory
The Black Box of Amazon FBA Inventory Placement
Amazon doesn’t tell you exactly where your inventory will end up—and that’s by design.
The algorithm decides based on demand forecasts, facility capacity, product characteristics, and your account settings. In 2026, with over 400 fulfillment centers globally and advanced AI (Project Amelia), placement is more dynamic than ever.
Understanding how it works helps you influence outcomes, cut fees, and deliver faster to customers.
Key Factors Amazon Uses to Decide Storage Location
| Factor | Weight (Estimated) | How It Influences Placement | Seller Impact |
|---|---|---|---|
| Customer Demand Forecast | Highest | Sends stock near high-demand regions | Strong sales history → local storage |
| Facility Capacity & Load | High | Avoids overcrowded FCs | Peak season → wider distribution |
| Product Size/Weight/Velocity | High | Large/heavy → specialized FCs; fast-movers local | Oversized → fewer location options |
| Your Program Settings | High | Pan-EU, EFN, CEE, or single-country | You control distribution breadth |
| Inbound Shipping Method | Medium | Partnered Carrier → better placement options | Cheaper routing may mean farther FCs |
| Historical Performance | Medium | Healthy IPI → more favorable placement | Low IPI → restricted storage |
Amazon optimizes for fastest delivery + lowest cost to them—not necessarily to you.
Default Placement: Amazon Optimized (Distributed)
When you ship to Amazon without extra options:
- Inventory split across multiple FCs (often 3–10+ locations)
- Goal: Minimize their shipping cost/time
- Common for U.S.: East/West Coast split
- EU: Often heavy in Germany + scattered
Pros: Faster average delivery, lower Amazon outbound cost Cons: Higher Inbound Placement fees if cross-region, more complex replenishment
Inventory Placement Service: Seller-Controlled (Single Location)
Pay extra (~$0.36–$1.90/unit depending on size/weight) to send all units to one FC you choose.
Pros
- Predictable replenishment
- Easier forecasting
- Lower split-shipment hassle
Cons
- Slower delivery to distant customers
- Potential higher Amazon outbound fees (passed indirectly via lower sales)
2026 Tip: Use for low-velocity or oversized items; default for high-velocity.
Regional Programs and Their Placement Logic
Pan-EU FBA
Inventory automatically distributed across DE, FR, IT, ES, PL (and sometimes SE/NL). Algorithm prioritizes local storage for fastest Prime delivery.
EFN (European Fulfillment Network)
All stock in one country (usually DE) → shipped cross-border as needed. Cheaper fees but slower delivery outside home country.
CEE (Central & Eastern Europe Program)
DE sellers: Stock in DE + PL/CZ for faster Eastern delivery + fee savings.
U.S. Regionalization
Similar logic: Amazon increasingly regionalizes for faster delivery (e.g., West Coast vs East).
How Product Characteristics Influence Placement
- Oversized/Heavy: Sent to specialized non-sortable FCs (fewer locations)
- Hazardous/Dangerous Goods: Limited certified FCs
- Apparel: Often fashion-specialized centers (IT/FR for Pan-EU)
- High-Velocity Bestsellers: Prioritized near population centers
Seller Tips to Influence Placement in 2026
- Strong Sales History Consistent velocity in a region → more stock stored locally.
- Use Inventory Placement Service Strategically For new launches or low-velocity → single FC near target customers.
- Choose the Right Program High cross-EU sales → Pan-EU Germany-focused → EFN in DE Eastern growth → CEE
- Ship Smart Use Amazon Partnered Carrier for better routing options. Split shipments manually if needed (advanced).
- Monitor and Adjust Use Seller Central’s “Inventory Planning” dashboard. Transfer inventory between FCs if unbalanced (costs extra).
- Prepare for Peak Amazon distributes wider during Q4 → plan higher inbound volume.
The Real Cost of Bad Placement
- Far storage → slower delivery → lower conversion/Buy Box share
- Wide distribution → more complex restocking + potential low-inventory fees
- Oversized in wrong FC → delays or refusals
Brands optimizing placement see 15–25% faster delivery and 8–12% higher sales velocity.
Conclusion
Amazon decides inventory placement to optimize their network—not yours.
But you’re not powerless. Choose the right program (Pan-EU for speed, Placement Service for control), build regional velocity, and ship strategically.
In 2026, the sellers who understand and influence placement win faster Prime delivery, happier customers, and higher margins.
Check your current inventory distribution in Seller Central today. One program switch or Placement Service use could transform your fulfillment efficiency.
Master placement—and let Amazon’s network work for you, not against you.
Need a logistics partner who understands the importance of getting every detail right? Contact FLEX..
