Honestly, there are numerous causes of stockouts. Products going out of stock can be caused by a variety of factors, including underestimating client demand, significant supplier delays, not having enough money to buy additional inventory, etc. Stockouts are frequently unavoidable and many times beyond the control of businesses disrupting the inventory levels impacted by delivery problems, production delays, human mistakes, or unpaid invoices. If these kinds of delays occur frequently, you should think about changing suppliers or looking for other ways to improve supply chain management, such as working with a third-party logistics (3PL) provider like AWL India which is Gurgaon based logistics provider and warehouse management services in PAN India, utilising technologically advanced tools to assist with inventory forecasting.

Source : https://www.awlindia.com/us-en/blog-details/navigation-in-inventory-stockouts-the-soul-of-business