Help common to the unitary and mass processing of the method change. This field is only visible during a unitary processing and can only be entered if the "Upd" indicator is set to "Yes" and if the depreciation method is equal to "OU" (Operation units). It contains the total quantity of operation units still to be produced over the residual use duration of the asset. Note: the value entered must remain superior or equal to the number of "fiscal year OU".