The Safety Stock Level Formula is a tool used by businesses to ensure they never run out of inventory. It helps them calculate how much inventory they need to keep on hand in order to meet customer demand and avoid the costs associated with stock-outs. To calculate safety stock, businesses must consider their average usage rate, lead time, and desired service level. By adding these numbers together, businesses can determine the ideal amount of inventory to keep on hand for any given product. With the Safety Stock Level Formula, businesses can rest assured that their operations are running efficiently and their customers are getting what they need when they need it.