The document discusses Material Requirement Planning (MRP) in SAP PP. It provides an overview of MRP, explaining that MRP determines what materials are needed, the quantities, and when. It also describes how MRP generates procurement proposals to plan for internal production or external procurement. The document outlines the key steps in an MRP run, including checking the planning file, calculating net requirements, determining procurement quantities, scheduling, exploding bills of materials, and presenting the results. It concludes by listing prerequisites for running an MRP.