A2014-15 is the actual operating expenditure for financial year 2014-15. Non-recurrent efficiency gains2014-15 is the adjustment made to base year opex used to forecast opex for the 2016–21 access arrangement period to account for opex associated with one-off factors. The incremental efficiency gain (or loss) for financial years 2017-18 to 2019-20 (inclusive) will be calculated using: Ei = (Fi-Ai) - (F(i-1) A(i—1)) – where Ei is the incremental efficiency gain in financial year i of the access arrangement period. Fi is the forecast operating expenditure in financial year i of the access arrangement period. Ai is the actual operating expenditure in financial year i of the access arrangement period. Fi-1 is the forecast operating expenditure in financial year i-1 of the access arrangement period. Ai-1 is the actual operating expenditure in financial year i-1 of the access arrangement period. Actual operating expenditure in the final financial year of the access arrangement period is to be estimated using: A*f = Ff (Fb Ab) + non recurrent efficiency gainsb – where A*f is the estimate of opex for the final year of the access arrangement. Ff is the forecast opex for the final year of the access arrangement period. Fb is the forecast opex for the base year used to forecast opex in the access arrangement period following this access arrangement. Ab is the actual opex for the base year used to forecast opex in the access arrangement period following this access arrangement. Non-recurrent efficiency gainsb is the adjustment made to base year opex used to forecast opex for the access arrangement period expected to commence 1 July 2021 to account for opex associated with one-off factors. The carryover amount for final financial year of the access arrangement period, is to be estimated using the following equation:
A2014-15 is the actual operating expenditure for financial year 2014-15. Non-recurrent efficiency gains2014-15 is the adjustment made to base year opex used to forecast opex for the 2016–21 access arrangement period to account for opex associated with one-off factors. The incremental efficiency gain (or loss) for financial years 2017-18 to 2019-20 (inclusive) will be calculated using: Ei = (Fi-Ai) - (F(i-1) – A(i—1)) where Ei is the incremental efficiency gain in financial year i of the access arrangement period. Fi is the forecast operating expenditure in financial year i of the access arrangement period. Ai is the actual operating expenditure in financial year i of the access arrangement period. Fi-1 is the forecast operating expenditure in financial year i-1 of the access arrangement period. Ai-1 is the actual operating expenditure in financial year i-1 of the access arrangement period. Actual operating expenditure in the final financial year of the access arrangement period is to be estimated using: A*f = Ff (Fb – Ab) + non recurrent efficiency gainsb where A*f is the estimate of opex for the final year of the access arrangement. Ff is the forecast opex for the final year of the access arrangement period. Fb is the forecast opex for the base year used to forecast opex in the access arrangement period following this access arrangement. Ab is the actual opex for the base year used to forecast opex in the access arrangement period following this access arrangement. Non-recurrent efficiency gainsb is the adjustment made to base year opex used to forecast opex for the access arrangement period expected to commence 1 July 2021 to account for opex associated with one-off factors. The carryover amount for final financial year of the access arrangement period, is to be estimated using the following equation: