Rounding Value in MRP-1 View

Hello Experts,

can you tell us how the rounding value effect the coverage day calculation in MD04 .

For example

if we set rounding value (480) in MRP-1 View ,actual coverage in days column in MD04 show 44 days

after MRP Run is taken

and if we set rounding value as zero in MRP-1 view , actual coverage days column in MD04 shows 12 days after MRP Run is taken

please explain logic of the calculation of acutal coverage days in MD04 .

Regards

Mahesh