On shelf availability is a key metric for retailers and suppliers. It is measured in various ways including physical audits, book stock data, and consumer surveys. Gaps in availability can occur throughout the supply chain from the supplier to the retail shelf. When products are out of stock, retailers typically lose 25% of potential sales while suppliers lose around 50%. Suppliers can improve availability by focusing on constant replenishment rather than large intermittent shipments, aligning data and measurements with retailers, and simplifying assortments and promotions. The appropriate on-shelf availability target will depend on the specific situation but generally ranges from 95-98.5%.