The Reorder Point field plays the following role in the planning calculations when the projected inventory is equal to or below the reorder point:

• The program will create an order proposal that is forward scheduled from the date of the requirement that caused the deficit in the projected available balance, unless a supply order has already been placed.
  
• The order proposal quantity will, at minimum, bring the projected available balance up to the level that is specified by the Reorder Point field.
  The final order proposal quantity may be further adjusted due to additional requirements within the time bucket, the effects of the reordering policy, and the quantity modifier fields: Minimum Order Quantity, Maximum Order Quantity, and Order Multiple.
  

Note
The reorder point must always be above the safety stock quantity.

If you leave the field blank, the program sets the reorder point quantity for the item to zero.

Note that the field is disabled when you select reordering policies Order and Lot-for-Lot.

Reference