Rules to Calculate Projected Final Units (HU)
You can update either the ETCU (estimate-to-complete units) or the EACU (estimate-at-completion units) field.
Note: Regardless of which field you
                update, the system updates the new projected final values into the BORG field of the
                HU ledger, and the balance/adjustment is made through the net posting field.
            
        - If you enter estimate-to-complete units, the system calculates HU using the formula ETCU + AU. 
- If you enter the EACU value, the system calculates difference the between EACU and AU and displays ETCU. 
- If EACU is zero, the system calculates HU using one of the two formulas AU + PU or RBLU, whichever is greater.