Development of a new concept for assessing labor intensity of civil aviation pilots

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E.V. Zibarev1, I.V. Bukhtiyarov1, O.K. Kravchenko1, P.A. Astanin2


1Izmerov Research Institute of Occupational Health, 31 Budennogo Ave., Moscow, 105275, Russian Federation
2Pirogov Russian National Research Medical University, 1 Ostrovityanova Str., Moscow, 117321, Russian Federation


The article describes a concept for assessing labor intensity (LI) developed by the authors. This concept is based on the results produced by comprehensive assessment of the current working conditions, by analyzing the psychophysiological state of civil aviation (CI) pilots in flight, as well as by assessing a contribution made by flight loads and signs of fatigue to an increase in a risk of aviation accidents (AA).

It has been established that, according to sanitary and hygienic profiles, LI levels at all workplaces of civil aviation pilots correspond to harmful working conditions, which are aggravated by exposure to four other harmful factors (noise, microclimate, vibration, and working posture) in 48 % of cases.

The research results have shown that the risks of fatigue increase significantly after 5 hours of flight. This fatigue manifests itself in the growing number of gaze fixations by 11 %; an increase in an average latency period of a complex visual-motor reaction, by 12 %; the growing number of significant errors for flight safety, by 50 %. All these processes occur in the absence of physiological recovery of the cardiovascular system, p < 0.05. Pilots who are in a state of fatigue and stress due to violated work and rest regimes tend to have more AA. This accounts for at least 8.4 % of cases from all others causes.

It is proposed to introduce the 3rd degree of harmfulness for strenuous work, as well as new LI indicators for sensory, informational and intellectual loads, such as an increase in a time required to fix the gaze on a device (in %), the frequency of image / value change on a screen (times/min), the volume of information flows per unit of time (bps), and the number of multifunctional devices (more than 10 bits per second). It has been established that the assessment of LI should be supplemented with specific indicators of the flight load and work regimes. These indicators include the number of takeoffs and landings, the number of crossed time zones, the number of stress factors during a flight, and the number of night flight shifts per week. They are directly related to developing fatigue among pilots and an increased risk of AA occurrence.

labor intensity, information loads, flight simulators, eye-tracking, fatigue, flight safety, risks of aviation accidents, psychophysiological studies, questioning
Zibarev E.V., Bukhtiyarov I.V., Kravchenko O.K., Astanin P.A. Development of a new concept for assessing work intensity of civil aviation pilots. Health Risk Analysis, 2022, no. 2, pp. 73–87. DOI: 10.21668/health.risk/2022.2.07.eng
  1. Bukhtiyarov I.V., Zibarev E.V., Kuryerov N.N., Immel O.V. Sanitary and hygienic assessment of working conditions of civil aviation pilots. Gigiena i sanitariya, 2021, vol. 100, no. 10, pp. 1084–1094. DOI: 10.47470/0016-9900-2021-100-10-1084-1094 (in Russian).
  2. Zibarev E.V., Bukhtiyarov I.V., Valtseva E.A., Tokarev A.V. Assessment of labor intensity indicators and factors affecting fatigue in civil aviation pilots based on the results of the questionnaire. Meditsina truda i promyshlennaya ekologiya, 2021, vol. 61, no. 6, pp. 356–364. DOI: 10.31089/1026-9428-2021-61-6-356-364 (in Russian).
  3. Investigations. The Interstate Aviation Committee (IAC). Available at: (13.03.2022).
  4. Kukushkin Yu.A., Ponomarenko A.V., Tsigin Yu.P., Stramnov S.B. Rezervy vnimaniya letchika kak otsenka protsessa podgotovki na aviatsionnom trenazhere [The pilot's attention reserves as an assessment of the training process on an aviation simulator]. Chelovecheskii faktor: problemy psikhologii i ergonomiki, 2007, vol. 38, no. 1–1, pp. 59–64 (in Russian).
  5. Vaisman A.I. Fiziologicheskaya kharakteristika nervno-emotsional'nogo napryazheniya voditelei vo vremya upravleniya avtomobilem [Nervous-emotional stress of drivers while driving]. Gigiena i sanitariya, 1975, no. 6, pp. 13–16 (in Russian).
  6. Denisov E.I., Prokopenko L.V., Eryomin A.L., Kourierov N.N., Bodiakin V.I., Stepanian I.V. Information as a physical factor: problems of measurements, hygienic evaluation and IT-automation. Meditsina truda i promyshlennaya ekologiya, 2014, no. 1, pp. 36–43 (in Russian).
  7. Denisov E.I., Eryomin A.L. Information, health, innovations: hygienic aspects. Vestnik RGMU, 2013, no. 5–6, pp. 114–118 (in Russian).
  8. Denisov E.I., Eryomin A.L., Stepanian I.V., Bodyakin V.I. Issues of measurement and estimation of information load at intellectual labour. Neirokomp'yutery: razrabotka, primenenie, 2013, no. 10, pp. 054–062 (in Russian).
  9. Bukhtiyarov I.V., Denisov E.I., Eryomin A.L. Bases of information hygiene: concepts and problems of innovations. Gigiena i sanitariya, 2014, vol. 93, no. 4, pp. 5–9 (in Russian).
  10. Zuev A.V., Fedotova I.V. Informational overstrain as a factor of occupational risk. Bezopasnost' i okhrana truda, 2015, no. 2, pp. 50–53 (in Russian).
  11. Powell D., Spencer M.B., Holland D., Petrie K.J. Fatigue in Two-Pilot Operations: Implications for Flight and Duty Time Limitations. Aviat. Space Environ. Med., 2008, vol. 79, no. 11, pp. 1047–1050. DOI: 10.3357/ASEM.2362.2008
  12. Surina E.I. Razrabotka i vnedrenie sistemy upravleniya riskami, svyazannymi s utomleniem: doklad-prezentatsiya vedushchego eksperta po bezopasnosti poletov i chelovecheskomu faktoru, chlena rabochei gruppy IATA po FRMS [Development and implementation of a fatigue-related risk management system: report-presentation of a leading expert on flight safety and the human factor, a member of the IATA FRMS working group]. Volga-Dnepr Group. Available at: (14.02.2022) (in Russian).
  13. Pilot Fatigue Barometer. European Pilots Association AISBL. Available at: (15.04.2022).
  14. Honn K.A., Satterfield B.C., McCauley P., Caldwell J.L., van Dongen H.P. Fatiguing effect of multiple take-offs and landings in regional airline operations. Accid. Anal. Prev., 2016, vol. 86, pp. 199–208. DOI: 10.1016/j.aap.2015.10.005
  15. Olaganathan R., Holt T.B., Luedtke J., Bowen B.D. Fatigue and Its Management in the Aviation Industry, with Special Reference to Pilots. JATE, 2021, vol. 10, no. 1, pp. 45–57. DOI: 10.7771/2159-6670.1208
  16. Dembe A.E., Erickson J.B., Delbos R.G., Banks S.M. The impact of overtime and long work hours on occupational injuries and illnesses: new evidence from the United States. Occup. Environ. Med., 2005, vol. 62, no. 9, pp. 588–597. DOI: 10.1136/oem.2004.016667
  17. Kandor I.S. Fiziologicheskaya stoimost' deyatel'nosti. Tyazhest' i napryazhennost' truda [Physiological cost of activity. The severity and intensity of labor]. Fiziologiya trudovoi deyatel'nosti. In: V.I. Medvedev ed. Saint Petersburg, Nauka, 1993, pp. 107–152 (in Russian).
  18. Bodrov V.A. O probleme utomleniya letnogo sostava [On the problem of flight crew fatigue]. Voenno-meditsinskii zhurnal, 1986, no. 5, pp. 40–43 (in Russian).
  19. Tomei F., Baccolo T.P., Tomao E., Palmi S., Rosati M.V. Chronic venous disorders and occupation. Am. J. Ind. Med., 1999, vol. 36, no. 6, pp. 653–665. DOI: 10.1002/(sici)1097-0274(199912);2-p
  20. Sechko A.V. Burnout in the stress system of aviation professionals. Sovremennaya za-rubezhnaya psikhologiya, 2021, vol. 10, no. 1, pp. 102–110. DOI: 10.17759/jmfp.2021100110 (in Russian).
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