In 2012, the FAA started an agencywide Metrics Harmonization effort. The FAA was faced with an increasing number of metrics being used or reported by various organizations, use of various data sources for the same calculation, use of multiple names for the same metric definition, and use of multiple definitions under the same metric name. The Metrics Harmonization effort is addressing terminology, methodology, and stewardship across FAA lines of business for all metrics. Its purpose is to bring order, consistency, and accuracy to metric reporting. The first phase of this effort is complete. This site presents the agency's harmonized operational metrics.

The metrics displayed show how FAA is performing in the areas of Safety, Efficiency, Capacity, Environment and Cost Effectiveness. Several metrics are marked with “R” to indicate they address reporting requirements included in Section 214 of the FAA Modernization and Reform Act of 2012, the law that reauthorized the FAA. Data are preliminary and subject to change. This web page is updated monthly. For inquiries, send an email to 9-NATL-Metrics@faa.gov.

Safety
Metric name Definition Unit Reporting scope Reported values Historical values
Commercial Air Carrier Fatality Rate

Rate of fatalities per 100 million persons on board. (more)

This metric includes accidents involving passengers, crew, ground personnel, and the uninvolved public.

Fatalities per 100 million persons on board

National Airspace System (NAS) commercial operations. (more)

Scope covers scheduled and non-scheduled passenger and cargo flights. It excludes on-demand service and general aviation.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
1.10 0.60
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General Aviation Fatal Accident Rate Rate of fatal General Aviation (GA) Accidents per 100,000 flight hours. Accidents per 100,000 flight hours

National Airspace System (NAS) General Aviation operations. (more)

Scope encompasses on-demand and general aviation flights.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
1.08 1.03
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System Risk Event Rate (SRER)R

The rate of high risk loss of standard separation events, per thousand events of loss of standard separation. The rate is computed over a rolling 12 month period. (more)

A loss of separation event is defined as any instance of non-compliance with radar separation standards. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

High risk events per 1,000 loss of standard separation events

National Airspace System (NAS) and radar controlled aircraft. (more)

All radar controlled aircraft flying under instrument flight rules (IFR) are in scope for this metric computation.

Current Fiscal Year to Date (FY14) and comparable values in FY13:
Reported values
FY13 Aug FY14 Aug
5.41 3.72
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Runway Incursions Rate (A&B)R

Rate of category A and B runway incursions per million operations. (more)

Runway Incursions involve the incorrect presence of an aircraft, vehicle or person on the airport surface designated for takeoffs and landings. Category A and B runway incursions have significant potential for a collision or require extreme action to avoid a collision. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Category A and B runway incursions per million operations

National Airspace System (NAS) (more)

The scope includes all airports with an air traffic control tower.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
0.22 0.31
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Hazard Risk Mitigations

Implement 80% of approved interventions to mitigate the Top 5 hazards associated with airborne losses of standard separation. This metric measures the Air Traffic Organization (ATO) success in mitigating the identified risks in the National Air Space (NAS). It moves the agency away from merely counting mistakes. (more)

By identifying the Top 5 Hazards and developing associated interventions, the FAA is taking a proactive stance in correcting the hazards identified, for each fiscal year.

Percent of approved interventions implemented National Airspace System (NAS) Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
68% 65%
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Commercial Space Launch Incidents

Number of accidents resulting in fatalities, injuries, or significant property damage. (more)

Accidents are defined as fatalities, injuries or significant property damage ($25K+) to the uninvolved public.

Number of accidents National Airspace System (NAS) Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
0 0

No incidents reported to date.

World-wide Fatal Aviation Accident Rate The rate of world-wide fatal accidents in Part 121-like operations, per million part 121-like operation departures. Accidents per million Part 121-like departures

World-wide operations (more)

The scope excludes passenger flights on aircraft with fewer than 10 seats, non-scheduled passenger flights with 10- 30 seats, and cargo flights with less than 7,500 lbs. of payload.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
0.41 0.65
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Efficiency
Metric name Definition Unit Reporting scope Reported values Historical values
Taxi-In Time

The Taxi-In time is computed as the duration between landing (wheels on) time and gate in time, as reported by carriers. A system value is obtained by averaging these durations over a period of time. (more)

The Average Taxi-in time for Core Airports is a good representation of NAS level activity.

Minutes

Core Airports (more)

The Department of Transportation (DOT) requires carriers to report actual gate in and wheels on times as Airline Service Quality Performance (ASQP) data.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
7.80 8.13
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Taxi-Out TimeR

The Taxi-Out Time is computed as the duration between gate out time and take off (wheels off) time. A system value is obtained by averaging these durations over a period of time. (more)

The Average Taxi-out time for Core Airports is a good representation of NAS level activity. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Minutes

Core Airports (more)

The Department of Transportation (DOT) requires carriers to report actual gate out and wheels off times as Airline Service Quality Performance (ASQP) data.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
17.17 17.16
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Average Gate Arrival DelayR

The arrival delay is computed as the gap between scheduled arrival (gate in) time and actual arrival time, whenever the actual arrival is later than the scheduled arrival time. Arrival Delays are averaged over a period of time. (more)

The Average minutes of arrival delay represent a fundamental metric for all National Airspace System (NAS) operators and for the public. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Minutes

Core Airports (more)

The Department of Transportation (DOT) requires carriers to report both scheduled and actual gate in times as Airline Service Quality Performance (ASQP) data.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
13.01 13.59
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Average Gate-to-Gate TimesR

The Gate-to-Gate time is computed as the duration between the gate out time at the departure airport and the gate in time at the arrival airport. A system value is obtained when averaging these durations over a period of time. (more)

Monitoring the Average Gate-to-Gate times for all Core Airports allows us to understand the overall behavior of the system. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Minutes

Carrier reported flights to and from Core Airports (more)

The Department of Transportation (DOT) requires carriers to report actual gate in and gate out times as Airline Service Quality Performance (ASQP) data.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
165 168
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Distance at Level Flight – Descent

The Optimization of Airspace Procedures in the Metroplex (OAPM) program started in 2011, under ATO's lead, and targets the country's busiest airspace. Efforts are under way to review descent procedures and reduce the distance flown at level flight. This continuous descent effort is focused on Core Airports. (more)

Level flight distance is calculated from Top of Descent (TOD) to runway threshold. New performance based navigation procedures will allow for more efficient lateral and vertical routes, overall resulting in fewer miles flown. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Nautical miles

Core Airports (more)

The scope includes all jet arrivals into Core Airports

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Apr FY14 Oct to Apr
39.63 38.23

This is a new metric, reported as of FY13.

Flown versus Filed Flight Times for Key City PairsR

Prior to departure, operators submit their flight plans to the FAA, and then a collaborative flight plan is filed and cleared for take-off. To compute this metric, we compare the latest flight plan time, as filed prior to departure, with the actual flown airborne time (wheels off to wheels on). A system value is obtained by averaging over a period of time, for all key city pairs. (more)

The average Filed versus Flown airborne time is an important indicator of National Airspace System (NAS) efficiency. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Minutes

National Airspace System (NAS) Core Airports and for NAS Key City Pairs. (more)

To respond to the request of reporting for "Key City Pairs", FAA put in place a NextGen Advisory Committee (NAC) tasking letter to request input on the definition of a set of city pairs that are a good representation for the NAS, and also reflect operational improvements throughout our system. The resulting list was reviewed and approved by the NAC, and is used for our metric computations.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
2.55 2.96
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Average Distance Flown between Key City PairsR

The Distance Flown is defined as the actual flown distance between wheels-off and wheels-on. The metric is reported as an aggregate for all key city pairs. (more)

The average Flown versus Filed airborne time is an important indicator of National Airspace System (NAS) efficiency. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Nautical miles

National Airspace System (NAS) Core Airports and for NAS Key City Pairs (more)

To respond to the request of reporting for "Key City Pairs", FAA put in place a NextGen Advisory Committee (NAC) tasking letter to request input on the definition of a set of city pairs that are a good representation for the NAS, and also reflect operational improvements throughout our system. The resulting list was reviewed and approved by the NAC, and is used for our metric computations.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
631 642
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Number of Arrival and Departure Delays

Delays of 15 minutes or more for arrivals and departures, captured by airport, for any number of days. (more)

The number of both arrival and departure delays is a meaningful indicator of efficiency. It conveys meaningful information to all operators, FAA, airline, aviation service providers and airport authority.

Count Core Airports Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
1,940,429 1,998,524
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Number of Operations

This metric is a count of all departure and arrival operations by airport, for all flights where FAA captured a flight plan record. (more)

The count of both arrival and departure operations provides a good foundation for assessing the overall level of National Airspace System (NAS) activity.

Count Core Airports Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
11,222,379 11,105,699
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NAS On-Time Arrivals

National Airspace System (NAS) On-Time Arrivals is the percentage of all flights arriving at the Core Airports less than 15 minutes late, based on the carrier flight plan filed with the FAA, and excluding minutes of delay attributed by air carriers to extreme weather, carrier circumstances, security delay, and prorated minutes for late arriving flights at the departure airport. (more)

Every month, DOT reporting carriers include the cause of arrival delay, along with the duration of all delays of 15 minutes or more. This metric captures delays that have been attributed to NAS and FAA related events. It is continuously monitored and used to take proactive action and reduce delays throughout the National Airspace System (NAS).

Percent of flights

Core Airports (more)

This measure is based on arrival delays at the Core Airports reported by the Aviation System Quality Performance (ASQP) carriers for domestic flights.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
90.36% 90.58%
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Capacity
Metric name Definition Unit Reporting scope Reported values Historical values
Average Daily Capacity (ADC)R

Sum of the number of flights the FAA facilities plan as capability for landings and take-offs in a month(s), divided by the number of days in the month(s). (more)

The Average Daily Capacity is computed using daily hourly-called arrival and departure rates at airports, also known as "published rates." FAA facilities continuously monitor and adjust these rates to reflect airport capability. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Number of arrivals and departures

National Airspace System (NAS) Core Airports and times of day relevant to the operations. (more)

To increase the impact of the ADC metric, the ATO focuses on the hours of the day during which capacity matters the most. These hours capture periods when well over 90% of Core Airports' operations take place.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
59,587 58,616
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Average Daily OperationsR

Sum of the number of flights the FAA facilities actually land and take-off in a month(s), divided by the number of days in the month(s). These average daily operation rates can be compared to the average daily capacity (ADC). (more)

The average daily actual operation rates for Core Airports are often compared to the ADC, or published rates. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Number of arrivals and departures

National Airspace System (NAS) Core Airports and times of day relevant to the operations. (more)

To allow for proper comparison with the ADC metric, ATO focuses on the hours of the day during which capacity matters the most. These hours capture periods when well over 90% of Core Airports' operations take place.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
30,706 30,397
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Runway Pavement Condition

Maintain runway pavement in excellent, good, or fair condition for at least 93 percent of the paved runways in the National Plan of Integrated Airport Systems (NPIAS). (more)

This metric allows the FAA to closely monitor the condition of the runways, thus ensuring runway availability throughout the system.

Percent of runways with pavement in fair or better condition Paved and open runways in the National Plan of Integrated Airport Systems (NPIAS) Metric is reported annually; the most recent FY data available are:
Reported values
FY12 FY13
97.5% 97.5%
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Adjusted Operational Availability

Adjusted Operational Availability is calculated by dividing the maximum facility/service hours minus all outage time, except for equipment improvements, by the total maximum facility/service hours, and multiplying by 100 to express the ratio as a percentage. (more)

The FAA monitors the availability of facilities necessary to maintain the provision of service in the National Airspace System (NAS). The Adjusted Operational Availability of facilities necessary to maintain the provision of service at the Core Airports are reported here.

Percent of hours when equipment is available

Core Airports (more)

Core Airports provide a good representation for National Airspace System (NAS) operations.

Current Fiscal Year to Date (FY14) and comparable dates in FY13:
Reported values
FY13 Oct to Aug FY14 Oct to Aug
99.74% 99.75%
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Environment
Metric name Definition Unit Reporting scope Reported values Historical values
Noise Exposure

Number of people exposed to significant noise (regardless of whether their houses or apartments have been sound-insulated). Significant aircraft noise levels are currently defined as values greater than or equal to Day-Night Average Sound Level (DNL) 65 decibels (dB). (more)

Day-Night Average Sound Level calculations add 10 decibels to night time noise to account for increased human sensitivity to noise at night.

U.S. population exposed to significant aircraft noise

Fiscal Year (FY) reporting reflects the previous calendar year period. (more)

For example, FY12 reflects January 2011 to December 2011.

Metric is reported annually; the most recent FY data available are:
Reported values
FY12 FY13
315,000 321,000
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Renewable Jet Fuel

Defined as the number of gallons of renewable jet fuel used by U.S. aircraft per calendar year. It includes all jet operations in the U.S., for both military and commercial use, since both are utilizing available supplies of renewable jet fuels. (more)

Renewable jet fuels include fuels derived from or containing renewable feedstock, such as oil seed crops, animal tallow, algae, and coal mixed with biomass. Computation includes both military and commercial operations.

Gallons of Renewable Jet Fuel for the National Airspace System (NAS)

Fiscal Year (FY) reporting reflects the previous calendar year period. (more)

For example, FY12 reflects January 2011 to December 2011.

Metric is reported annually; the most recent FY data available are:
Reported values
FY12 FY13
N/A 49,600

This is a new metric, reported as of FY13.

NAS-Wide Energy Efficiency

Computed as the ratio of estimated Fuel Burn and the actual Distance flown, in units of Kilogram per Kilometer. (more)

FAA is working with aviation stakeholders to obtain actual fuel burn data. Actual data will allow for a significant accuracy improvement.

Kilogram per Kilometer for the National Airspace System (NAS)

Fiscal Year (FY) reporting reflects the previous calendar year period. (more)

For example, FY12 reflects January 2011 to December 2011.

Metric is reported annually; the most recent FY data available are:
Reported values
FY12 FY13
4.10 4.06
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Emissions Exposure (CO2 Emissions)

Quantity of Carbon Dioxide (CO2) emitted by aircraft engines, measured in kilograms.

Note: This metric is under development. Eventually, the CO2 emissions will be replaced by the number of people exposed to elevated pollutant concentrations.

Kilograms of CO2 for the National Airspace System (NAS)

Fiscal Year (FY) reporting reflects the previous calendar year period. (more)

For example, FY12 reflects January 2011 to December 2011.

Metric is reported annually; the most recent FY data available are:
Reported values
FY12 FY13
2.16x1011 1.73x1011
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Cost Effectiveness
Metric name Definition Unit Reporting scope Reported values Historical values
Unit cost per operationR

FAA is currently computing and reporting its unit cost per operation, for operations reported by all its facilities. (more)

Costs include all operating costs assignable to the Air Traffic Organization (ATO) under FAA's Cost Accounting System (CAS), including an assignment of FAA overhead costs. Operation counts include both instrument and visual flight conditions, for Federal and Contract facilities. This metric is part of the Re-Authorization Bill Section 214 performance metrics requirements.

Cost in U.S. dollars per air traffic operation FAA computes this metric for the National Airspace System (NAS) Metric is reported quarterly; the most recent values for Fiscal Year to Date (FY14) and comparable dates in FY13 are:
Reported values
FY13 Oct to Jun FY14 Oct to Jun
$87.41 $85.45
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