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INTEGRA Overview |
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Various automated support tools for air traffic controllers have been proposed which aim to reduce control work per aircraft and thereby increase capacity. The potential benefit these tools can bring needs to be evaluated in order to help decide which tools and concepts should be taken on to operational deployment. As well as quantifying the expected capacity benefit, safety and flight efficiency must be addressed: capacity gains must certainly not degrade safety, and should improve both safety and flight efficiency if possible.
Although ATM systems using automated support tools have been exercised in simulators over a number of years, the foreseen benefits have yet to be conclusively demonstrated.
Validation is required to provide decision-makers with evidence that money spent developing a proposed new ATM concept or tool can be repaid in operational benefit. INTEGRA’s focus has therefore been to deliver quantitative and objective assessments of performance from real-time simulations of such future ATM systems.
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INTEGRA is a methodology (process) aimed at providing high-level management tools to quantitatively measure the benefit of the inclusion of advanced computer assistance tools in ATM systems. These benefits are measured in terms of Capacity, Safety and Efficiency with the results providing data for input to system designers and Cost Benefit Assessment (CBA) studies to support high-level management decisions.
The metrics used in any simulation experiment are essentially the public interface of a whole measurement process, encompassing experimental design, training of participants, specifying the simulated system, trials execution, data recording and analysis. No set of metrics can be considered in isolation from that process, because we must know the meaning behind the data we have recorded.
The metrics can be used in simulations within EUROCONTROL and at other establishments to give a common framework for measurements which are: meaningful, understandable and comparable across different projects and experiments. The measurements form a basis for implementation decisions.
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The INTEGRA process interacts with all stages of real-time simulations from the definition, through execution and analysis to provide validation results in terms of Capacity, Safety and Efficiency.
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What does the INTEGRA process require? |
To apply the INTEGRA metrics there are a number of prerequisites:
- Clear experimental objectives and design for the simulation project itself
- Traffic samples for the region/area consistent with current and predicted traffic flows
- A mature experimental environment
- Disciplined execution of the experiment
- The INTEGRA Capacity, Safety and Efficiency metrics
- Skilled practitioners in the use of the metrics and interpretation of the results
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The INTEGRA metrics determine:
- Capacity
The Capacity Metric provides measurements that do not rely on self assessment. It identifies the processing load that is needed to perform a task and produces quantitative results.
- Safety
It is not possible to measure safety directly so the Safety Metric has adopted surrogate measures which have been termed Propensity and Resilience. Safety is inextricably linked to Capacity.
- Efficiency
Efficiency assessment is always relative to an ideal case. The Efficiency Metric calculates the difference between requested and flown trajectories and applies input factors to produce output related to, for example, Fuel burn costs, CO2 emissions etc, Crew costs, Engine maintenance costs. The actual outputs produced depend on the requirements of the experiment.
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Last validation: 03/10/2005
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