The figure shows a 'Material Requirements Planning system'.

Explanation:
Material requirements planning (MRP) is a production planning and inventory control system that helps manufacturers manage the production process. It involves determining the quantities and timing of raw materials, components, and subassemblies needed to produce finished goods.

Inventory status file:
The inventory status file is an important input in MRP. It contains information about the current inventory levels of raw materials, components, and finished goods. This information is necessary to determine the availability of materials for production and to calculate the reorder quantities.

Bill of materials (BOM):
The bill of materials (BOM) is another important input in MRP. It is a list of all the components, subassemblies, and raw materials required to produce a finished product. The BOM provides information on the quantities and relationships between the different parts, allowing MRP to calculate the material requirements based on the production schedule.

Scheduled receipts:
Scheduled receipts are also an important input in MRP. They refer to the planned delivery dates and quantities of incoming materials or components. This information helps MRP determine when and how much material will be available for production.

Master production schedule (MPS):
The master production schedule (MPS) is a key input in MRP. It is a plan that specifies the quantity and timing of finished goods production. The MPS provides information on the production requirements, allowing MRP to calculate the material requirements and schedule the production accordingly.

Correct answer:
The correct answer is option 'C' - Scheduled receipts. Scheduled receipts are not used as necessary information input in MRP. While they are important for determining the availability of materials, they are not directly used in the MRP calculations. Instead, MRP uses the inventory status file, BOM, and MPS to calculate the material requirements and schedule the production. Scheduled receipts are more relevant to materials planning and procurement processes.