The DRP, or Distribution Resource Planning, is a plan that defines the supply needs over a given period throughout the supply chain. Its goal is to optimize stock levels to allow Supply teams to manage them as finely as possible, avoiding stock shortages or, on the contrary, overstocking. Added to this is all the logistics management and distribution of resources from procurement to customers, with all the associated financial dimensions.
Here is a more detailed article (in french) on the subject : Le DRP : votre allié pour gérer votre Supply Chain