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Clockwork Research

Quantifying Schedule Fatigue

Quantification of fatigue in your schedule

Clockwork utilises bio-mathematical models to analyse both planned and worked schedules to provide you with the answers to key questions:

  • What features of our planned and actual schedules are consistently contributing to elevated fatigue levels?
  • What is the impact of on-the-day delays or operational changes on fatigue?
  • How do fatigue levels change per month and seasonally?
  • Do our different bases have different fatigue profiles
  • Are we continually improving?

Assessing the impact of schedule changes

One way in which bio-mathematical models can enhance FRM is by assessing the impact that changes to schedules or alternative schedule designs have on fatigue. For example, fatigue models can help to answer the following questions:

  • For my long-haul or ULR operation, how can we schedule crew in the days or weeks prior to the flight to maximise performance and minimise fatigue?
  • What is the fatigue impact of delaying the reporting time for specific duties?
  • If I change the number of long-haul flight deck crew on an augmented flight, how will the changed in-flight sleep patterns impact fatigue levels at landing?
  • What is the best order in which to schedule disruptive short-haul duties in a run of duties?

An analysis of your schedules to assess alternative scheduling options provides you with an in depth understanding of the levels of schedule-related fatigue. At Clockwork, we have extensive experience of using bio-mathematical models, and have developed a suite of metrics that give you a detailed assessment of schedule related-fatigue. Using these metrics, we can work with you to develop Safety Performance Indicators (SPIs) for schedule-related fatigue, for ongoing tracking within your FRM.

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We have been working closely with Clockwork since 2013. They have been instrumental in the airline successfully setting up an effective fatigue programme, through an in-depth analysis of the airlines operations and produced excellent training materials to improve the crew understanding of fatigue. The staff at Clockwork are extremely knowledgeable and professional, making it easy to achieve good results in reducing the risks associated with fatigue in our very complex environment.open quote

Russel Ellis

Director, Operations Control

Air Astana

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Clockwork’s insights and experience enabled us to improve our data collection rates and their analytical skills offered invaluable insights into operational issues. It is fair to say that Clockwork has caused us to completely rethink our LOSA process, turning it into a true added-value proposition.open quote

Norman MacLeod

Human Factors Manager

Cathay Pacific Airlines

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Luxair has built a strong link to Clockwork over the past years. Not only did they help us to develop successful fatigue surveys with our cabin and cockpit crews but they also played a major role in the development of our fatigue reporting, our FRMS training and the analysis of our scheduling practices. Clockwork's staff were always open to our ideas/thoughts and with their professionalism and dedication helped us achieve our goal of mitigating fatigue related risks through our SMS.open quote

Pascal Kremer

Safety Manager

Luxair