4PL, or Fourth Party Logistics, is a business model that involves the use of an outside organization to manage the entire supply chain process. This model is often used when a company needs to outsource the management of their supply chain to a third-party organization that specializes in the logistics of the process. 4PLs are responsible for coordinating the activities of all the parties involved in the supply chain, from the suppliers to the end customer. This includes managing the transportation, warehousing, inventory, and other aspects of the supply chain. 4PLs are also responsible for negotiating contracts with suppliers, ensuring the quality of products, and providing customer service. By utilizing a 4PL, companies can reduce costs, increase efficiency, and gain access to a larger network of suppliers. Additionally, 4PLs can provide the expertise and resources necessary to ensure that the supply chain runs smoothly and efficiently.