Enter a number of days that are added to a requirement due date to define a time interval during which a planned receipt ...

Enter a number of days that are added to a requirement due date to define a time interval during which a planned receipt that is due can be used to fulfill the requirement. A planned receipt that is due outside the defined time interval cannot be used to fulfill the requirement, and master scheduling generates a new planned order. You can equate negative days with the number of days that a delivery can be past due before you create a new fulfillment order. During this period, there is a negative inventory level for the item. You can specify negative days in the Item coverage page or the Coverage groups page. The full behavior of negative days depends on whether you select the Use dynamic negative days option in the Master planning parameters page. For example, for an item, a purchase order is scheduled for receipt on the twentieth of the month, and a sales order is scheduled for delivery on the nineteenth of the same month. Master scheduling either generates a new planned purchase order to cover the requirement, or it creates a late sales order delivery on the twentieth. If you set the negative days to 0 (zero), a new planned purchase order is generated. If you set the negative days to a number greater than zero, no planned purchase order is generated. Instead, an action message is generated for the purchase order, and a futures message is generated for the sales order.