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Inventory · Definition

Fill Rate

The share of demand met from stock on hand without delay.

Fill rate measures how often you can satisfy an order immediately and completely. It can be counted by line, by order or by unit, and each version tells a slightly different story about customer experience.

Order fill rate is the harshest measure because a single missing line fails the whole order. It is the metric that connects inventory investment to service quality.

How it is calculated

Fill rate = Units shipped on time ÷ Units ordered

Line fill and order fill variants use lines and complete orders instead of units.

Also called

  • order fill rate

See it in AWRA OpsHub

Inventory Insights

Related terms

Service Level

The target probability of meeting demand without a stockout.

Stockout

Running out of an item so demand cannot be fulfilled.

Available to Promise

ATP

The stock you can genuinely commit to a new order after existing allocations.

Backorder

An order accepted for an item that is currently out of stock.

More in Inventory

ABC Analysis Asset Tracking Barcode Carrying Cost Consignment Inventory Cycle Count Cycle Stock Days Inventory Outstanding (DIO)

Fill Rate is not just a definition here

Inventory runs on this vocabulary every day in AWRA OpsHub — 44 of our 259 glossary terms describe things the platform actually does.

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