TSAS Benefit Summary

Presented to:  REDAC

By:  AJV-7

Date:  March 2017

Federal Aviation

Administration

Federal Aviation

Administration

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TSAS

Terminal Sequencing and Spacing (TSAS) is part of Time-Based Flow Management (TBFM) Work Package 3 (WP3) which received its final investment decision (FID) in April 2015

TSAS is formerly known as TSS

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Federal Aviation

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Benefits Development Methodology

Identify Potential Benefits

Initial concept development targets an operational shortfall (e.g., need for improved sequencing and spacing in Terminal area)

Feedback during variety of concept validation exercises

Exercises include “table-top” as well as part-task or full-task simulations

Subject Matter Experts (SMEs) asked to identify what helped and why, and what could augment the current concept

Measure Benefits

Conduct balanced Human-in-the-Loop (HITL) simulation using SMEs that compare use with and without proposed tool

HITL design should provide comparison data on identified potential benefits

Results based on objective and subjective data

Project how HITL results can be extrapolated to other facilities and/or across the NAS

Data Analysis

Fast-time simulations

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Federal Aviation

Administration

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TSAS Benefit Areas
| Types of Benefit           | Benefit                                                                                                                                                                                     | Source                                      |
|----------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------|
| Trajectory Efficiency      | Decrease in delays through reduced flight time                                                                                                                                              | TSS2 HITL, 2013                             |
|                            | Savings due to greater use of optimal trajectories and reduced ground tracks                                                                                                                | TSS2 HITL, 2013                             |
| Throughput*                | Increase throughput due to the ability to realize more efficient arrival spacing                                                                                                            | TSS2 HITL, 2013; TBFM WP3 Shortfalls, 2013  |
| Safety                     | Decreased probability of loss of separation due to TSAS spacing assurance                                                                                                                   | SME input based on reduced route deviations |
|                            | Reduced controller workload due to improved capability to maintain the queuing flights on their published routes & STA with less control actions                                        | Various HITLs 2013-2014                     |
|                            | Decreased deviations from published routes                                                                                                                                                  | Application of ASIAS study, 2012            |
| Environmental              | Reduction in CO2 emissions and noise level                                                                                                                                                  | TSS2 HITL, 2013                             |
| TBFM Schedule Improvements | Improved scheduling allows better merging of flows to the runways allowing En Route and TRACON controllers to work toward common plan that includes appropriate spacing at all merge points | SME input based on HITL experience          |

Source: derived from TBFM WP3 BBOE

* Not part of economic analysis

ASIAS: Aviation Safety Information Analysis and Sharing

STA: Schedule Time of Arrival

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Federal Aviation

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Reduced Flight Time and Fuel Burn 

TSAS shortens flying time in TRACON

More RNP approaches with RF-leg (curved)

Less vectoring

TSAS promotes more efficient trajectories in TRACON

Source: TBFM WP3 BBOE

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Federal Aviation

Administration

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TSS2 HITL Results

Source: TSS2 HITL, April 2013

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Federal Aviation

Administration

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TSS2 HITL Results

Source: TSS2 HITL, April 2013

More flights fly RNP approach in mixed environment

More efficient routes for all flights

RF-Leg flown 100%

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Federal Aviation

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TSAS Benefit Numbers
|                                | Risk-Adjust FY14$M |
|--------------------------------|--------------------|
| Airline Direct Operating Costs | $477.82            |
| Passenger Value of Time        | $541.31            |
| Total                          | $1019.13           |

Lifecycle: 2020-2039
|                                | Risk-Adjust PV$M |
|--------------------------------|------------------|
| Airline Direct Operating Costs | $156.60          |
| Passenger Value of Time        | $177.40          |
| Total                          | $334.00          |

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Federal Aviation

Administration

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