8 Detailed information on the calculation of ACE indicators
8.1 Cost-effectiveness indicators
The main indicators used in ACE to analyse ANSPs cost-effectiveness are:
economic cost-effectiveness;
financial cost-effectiveness;
ATCO-hour productivity;
ATCO employment costs per ATCO-hour; and,
support costs per composite flight-hour.
The table below presents the formulas used to calculate these indicators with reference to the SEID item numbers.
| # | Indicator | Formula | Source |
|---|---|---|---|
| 1 | Composite flight-hours | En-route flight-hours +(0.28×IFR airport movements) | En-route flight-hours: Item D16, continental ANS IFR airport movements: Item D18, SES airports + Non-SES airports 0.28 is the two-digits rounded weighting factor (see Chapter 3) |
| 2 | Economic cost-effectiveness | (Total service provision costs+Total costs of ATFM delays)/(Composite flight-hours) | Total service provision costs: Item A15 (en-route + terminal columns) Total costs of ATFM delays: Minutes of ATFM delays extracted from the Network manager database, monetarised using the cost of a minute of ATFM delays (see Chapter 4) Composite flight-hours: Formula #1 |
| 3 | Financial cost-effectiveness | (Total service provision costs)/(Composite flight-hours) | Total service provision costs: Item A15 (en-route + terminal columns) Composite flight-hours: Formula #1 |
| 4 | ATCO-hour productivity | (Composite flight-hour)/(Sum of ATCO in OPS hours on duty) | Composite flight-hours: Formula #1 Sum of ATCO in OPS hours on duty: Item D22 (ACCs + APPs+TWRs columns) |
| 5 | ATCO employment costs per ATCO-hour | (Staff costs for ATCOs in OPS)/(Sum of ATCO in OPS hours on duty) | Staff costs for ATCOs in OPS: Item C23 (en-route + terminal columns) Sum of ATCO in OPS hours on duty: Item D22 (ACCs + APPs+TWRs columns) |
| 6 | Support costs per composite flight-hour | (Total service provision costs-ATCOs in OPS Employment costs)/(Composite flight-hours) | Total service provision costs: Item A15 (en-route + terminal columns) ATCOs in OPS Employment costs: Item C23 (en-route + terminal columns) Composite flight-hours: Formula #1 |