MRP means Material Requirement planning. It helps for inventory management of material.
There is a two MRP view:
MRP1 & MRP2
MRP1: In this view,maintain the min. & Max stock of material that must be required for plant that is level of matarial that is required & before stock is less than the min. stock it is to be procured.
MRP2: In this view, who is the requisioner plant/where it used that data will be maintain in this view so they can also make PR for that material.