Field help (PPLCPLQTY) 

Entering the actual operation units for the period is optional and possible only on the line of the plan corresponding to the current period. The number of authorized decimals depends on the chosen unit.
If the number of Actual OUs is higher than the number of Residual OUs, the total number of OUs in the production plan is revised upon validating the confirmation message.
When the number of Actual OUs is modified, the plans amortized according to the OU - Operation units method of the assets linked to the production plan must be recalculated.