Materials Requirement Planning is driven by

Concept:

Material Requirement Planning (MRP) is a method of working out the production plan in a multistage production system that produces many products and require their raw materials and subassemblies. It is used to show that all the things needed should be available within the production system at an appropriate time and production can be carried out without any delay.

Master Production Schedule (MPS) is a complete timetable of our scheduled production in the future. It gives information about what product is to be produced, when it is to be produced and in how much quantity.

Materials requirement planning is driven by not only the master production schedule but also the bill of material, inventory record file, etc.

Here is a schematic diagram of the interdependencies of various parts of MRP.