What defines the quantity that is reordered during an MRP run in product master data?

The correct choice, which pertains to the quantity that is reordered during a Material Requirements Planning (MRP) run, is the Lot Size Procedure. This procedure determines how much of an item is to be produced or procured at once. Within the product master data, the lot size settings establish rules such as whether orders should be placed in fixed amounts, variable amounts, or based on minimum/maximum levels, directly influencing the reorder quantity.

Using the Lot Size Procedure allows businesses to optimize their inventory levels, ensuring that they maintain adequate stock while minimizing excess inventory. Essential parameters, such as economic order quantities, can be set, which directly impacts planning and decision-making around inventory control.

The other choices reference different aspects of product master data that do not specifically define the reorder quantity. For example, the MRP Procedure deals with how MRP calculates requirements, the Procurement Type specifies whether materials are obtained through internal production or external purchasing, and the Special Procurement Key relates to particular procurement strategies like subcontracting or consignment. However, none of these options directly determine the quantity of stock that is reordered.