The Perpetual Inventory System is a business model that allows businesses to have real-time information regarding the quantity of products in their inventory. This system tracks and records changes in inventory on an ongoing basis, with updates occurring immediately after each transaction. It is an efficient way of tracking inventory levels that can help businesses reduce costs and maximize profits. By providing up-to-the-minute information about stock levels, it is easier for businesses to identify trends and areas for improvement – ultimately improving customer satisfaction and loyalty.