FMCG Glossary

What is OSA?

On-Shelf Availability

Definition

On-Shelf Availability (OSA) is the percentage of time a product is available on shelf when a shopper wants to buy it. OSA failures — where a product is not on shelf despite being ranged — directly drive lost sales and can damage brand equity and retailer relationships.

Examples of OSA in FMCG

  • A product ranged in 1,500 Tesco stores but out of stock in 150 stores = 90% OSA
  • A field sales rep auditing 20 stores and recording how many have the agreed planogram in place
  • An OSA dashboard showing real-time stock levels by store from EPOS data

OSA in the FMCG Industry

Industry research suggests FMCG OSA rates average around 90–95%, meaning 5–10% of ranged stores are out of stock at any one time. The cost of this lost sales is substantial — some estimates put FMCG-wide losses from poor OSA at billions annually. Improving OSA is a shared responsibility between the supplier's supply chain and the retailer's replenishment systems.

Why OSA Matters for Your FMCG Career

OSA is a KPI for field sales, supply chain, and category management roles. Supply Chain Managers track OTIF (closely linked to OSA), while field sales representatives are often measured on store compliance and OSA improvements from their visits.

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