By defining multiple MRP names, you can define any number of material requirement plans. You can use multiple plan names to simulate MRP for different sets of data. Supply Chain Planning users can also define DRP and multi–organization MRP.

Launching the MPS/MRP Planning Process
You can launch the planning process for a material requirements plan (MRP) or a master production schedule (MPS). The planning process involves three phases for defining the MRP or MPS. It uses the input from a master demand schedule or master production schedule to determine the quantities and timing of the items to be manufactured or purchased.
Attention: If you’re using the Drop Shipment feature of Order Entry and Purchasing, you’ve set up logical orgs for P.O.
receipts. Do not use these logical orgs for planning purposes.