FBA Performance Tracking

Know Which Amazon Warehouses Are Fast -- And Which Aren't

Most inventory tools treat Amazon FBA as one location with one lead time. But anyone who ships to FBA regularly knows the truth: receiving times vary wildly by fulfillment center.

One FC processes your shipment in 3 days. Another takes 3 weeks. If you're planning with a single generic lead time, you're wrong in both directions -- over-stocked at fast warehouses, running out at slow ones.

Why One Lead Time Doesn't Work

Here's what happens when you use a blanket 14-day FBA lead time:

• Shipment to FC-A -- Actually received in 4 days. Your safety stock calculation assumed 14 days, so you shipped too much. Now you're paying storage fees on excess inventory.
• Shipment to FC-B -- Actually received in 22 days. Your safety stock assumed 14 days, so you didn't ship enough. You stocked out for 8 days before the inventory became available.

Both shipments were planned with the same number. Both were wrong. The only question is whether you lose money on storage fees or lose money on missed sales.

What ReplenishRadar Tracks

ReplenishRadar monitors your FBA inbound shipments and records actual receiving performance at the fulfillment center level.

Per-FC receiving times -- Not just "how long does Amazon take," but how long does each specific fulfillment center take. We track the full timeline from shipment creation to units available for sale.

Trend detection -- Receiving performance changes over time. A warehouse that was fast in January might slow down in Q4 when Amazon is swamped. We track these trends so your planning reflects current conditions, not last quarter's averages.

Automatic buffer adjustments -- When we detect that a fulfillment center consistently takes longer than expected, we adjust our replenishment recommendations. You don't have to manually update lead times every time Amazon gets slower.

Outlier flagging -- If a shipment takes significantly longer than normal for that FC, we flag it. Sometimes a delay is systemic. Sometimes it means something went wrong with that specific shipment and you need to investigate.

How This Changes Your Planning

When your transfer suggestions account for actual FC performance instead of a generic average, two things happen:

1. You stop over-shipping to fast warehouses. Less capital tied up in FBA storage. Lower long-term storage fees.
2. You stop under-shipping to slow warehouses. Fewer stockouts. More consistent Buy Box coverage.

The math is the same either way -- forecast demand times days of coverage. The difference is that the "days of coverage" number is actually right.

Pair With Transfer Suggestions

Transfer Suggestions tells you what to send and when. FBA Performance Tracking makes those suggestions more accurate by using real receiving data instead of assumptions. Together, they close the gap between "planned" and "actual."

Availability

Related Features

• FBA Inbound Tracking -- Track shipment status from creation to received
• Transfer Suggestions -- Get smarter replenishment recommendations
• Unified Inventory -- See FBA stock alongside warehouse and retail

Learn More

• Amazon FBA Restock Strategies -- Optimize your FBA replenishment workflow
• Fix FBA Stranded Inventory -- Handle stuck and delayed shipments
• Stockout Cost Calculator -- Calculate the revenue impact of FBA stockouts

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