Data & Insights
Walmart On-Shelf Availability (OSA):
A Supplier’s Guide
On-shelf availability (OSA) is whether a product is on the shelf when a customer wants to buy it. At Walmart it’s closely tied to ‘surety of supply’, Walmart’s confidence that a supplier can maintain a healthy flow of inventory so out-of-stocks stay rare. Strong OSA protects sales; weak OSA quietly loses them.
Updated: June 2026
What Is On-Shelf Availability (OSA)?
OSA measures the share of time a product is available on the shelf for purchase. It starts with a supplier’s ability to consistently produce the volume Walmart requires, then depends on getting that volume through the supply chain to the shelf.
How Is OSA Measured at Walmart?
OSA is generally expressed as an in-stock percentage how often an item is available when shoppers look for it drawn from sales and inventory signals. Persistent gaps between expected and actual availability flag OSA problems.
What Causes Low On-Shelf Availability?
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Production shortfalls (can’t make required volume)
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Forecast misalignment (supply plan vs. actual demand)
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OTIF failures (late or short shipments)
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DC inventory gaps in the pipeline
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Store-level execution (product in back room, not on shelf)
How to Improve On-Shelf Availability
Once production is in place, align your logistics network to deliver on time and in full (OTIF), keep your supply plan and forecast aligned, and work closely with your Walmart replenishment manager to confirm orders support demand.​
On-Shelf Availability FAQs
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What is surety of supply? Walmart’s confidence that a supplier can reliably keep inventory flowing so stockouts stay limited.
OSA and OTIF: How They Connect
On time and In Full is delivering the right quantities on time and is one of the biggest drivers of OSA. Late or short shipments create DC and shelf gaps, so improving OTIF directly improves on-shelf availability.