Why?

It is uglier than that.  The Work Order files (WOBOM and WOMAT) can handle the 4 decimal places but the Inventory files (UOH in BKICMSTR and Qty in INVTXN) are only 2 places.   What it does now is update WOBOM (and therefore the remaining allocation) to 4 places but round everything else to 2 places.  We could have it also save WOMAT to 4 places so the JC-E and JC-A reports would agree but there is still the potential for rounding differences between JC-E and IN-E for I type transactions.