What is service level in inventory management, and what consequence does a high stockout rate have?

• A. The service level is the annual procurement budget.
• B. Service level is the percentage of orders filled from stock on hand.
• C. Service level is the number of suppliers.
• D. Service level is the rate of on-time deliveries.

Answer: (B)

Service level in inventory management is a measure of how often you can satisfy demand directly from the stock you have on hand. In practice, it’s the percentage of orders (or units) that are filled immediately from available inventory without needing to backorder or rush replenishment. This is why the correct description is the share of orders filled from stock on hand.

If stockouts are frequent, the service level drops. That leads to backorders and unmet demand, which can cause lost sales, dissatisfied customers, and higher costs from urgent restocking or expedited shipping. In short, a high stockout rate undermines the ability to fulfill orders promptly and reliably. The other options describe different concepts (budget, number of suppliers, on-time deliveries) that aren’t what service level measures.