The Percentage of Out of Stock Items KPI measures the number of items that are out of stock at the time a customer places an order. It measures your ability to meet customer demand, a key aspect of running a successful supply chain business. This KPI also requires additional information, since seasonal or unexpected order volumes can cause spikes in this metric. It is important for your organization to be able to anticipate what items are most popular.
# of items out of stock / # of items in stock