Validation of air traffic controller workload models
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1979-09-01
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Edition:F inal Report; February 1978 - April 1979
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Abstract:During the past several years, computer models have been developed for off-site
estimat ion of control ler's workload. The inputs to these models are audio and
digital data normally recorded at an Air Route Traffic Control Center (ARTCC).
This report summarizes the results of a study to validate the models at the
Chicago ARTCC. For validation purposes, two additional estimates of workload
were used.
One estimate consisted of journeyman controllers observing peer control lers during
actual operations and assigning workload ratings. A second estimate of workload
was obtained from a survey of controllers based on past exper iences working the
sectors. During this time, audio and digital data were collected and then processed
off-line for inputs to the controller workload models. The models were then
used to estimate controller workload. A high degree of correlation was found between
the models' estimated workloads and controllers' estimates of workload. Based on
this validation study, it is concluded tha t the models can be used to provide an
index of controller workload and as a prediction of controller workload as a function
of traffic .
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