MRP (Material Requirements Planning) is used to plan and control stock levels and supplies of raw materials in a production environment. The MRP system takes into account production data such as demand for finished goods, lead times from suppliers, current stock levels and production times to determine raw material requirements and schedule orders accordingly. The objective of MRP is to ensure that the necessary raw materials are available when needed to avoid production delays and additional costs.
Here is a more detailed article (in french) on the subject : Améliorez votre supply grâce au MRP