Field help (DLUSMX) 

Update 8.0.0 and higher:
SEEREFERTTO  This field can be accessed in the Expirymanagement mode of the product.
The UBD coefficient is used to calculate, in calendar days, the use-by date lead time of the product, based on the shelf life.
UBD lead time = Shelf life x UBD coefficient.

SEEWARNING  The value of the coefficient must be between 0.1 and 1: the UBD cannot exceed the expiry date.

This UBD lead time is used to determine the use-by date of the product, based on the reference expiry date.
UBD Date = Reference expiry date + UBD lead time.