Item shortage threshold consider the minimum quantity or ROP calculated by replenishment plan ?

Hi,
Can the shortage threshold percentage defined in Manage Item Shortage Parameters be expressed as a function of the minimum quantity/ROP calculated from a replenishment plan or specified in the policy assignment set?
In our current configuration, only the minimum and maximum quantities for items managed with the scheduled “print min max report” process and not planned by replenishment are defined at the item subinventory level.
For all item subinventory associations that are planned with replenishment plans, the minimums/ROP are either calculated by the system or overwritten in the policy assignment set.

So, how can i use the item shortages page for this items ?