FAID Score as used in FAID Quantum

The FAID Standard biomathematical model, as used in FAID Quantum software, provides a representative score (FAID Score) of the fatigue exposure of a worker. There is no unit or absolute measure of fatigue. A FAID Score indicates the likely sleep opportunity that a work pattern allows. As the relative sleep opportunity associated with a work pattern decreases, the FAID Score increases. It takes into account the following biological determinants of fatigue:

  • Duration of work & breaks
  • Time of day of work & breaks
  • Work history from preceding 7 days
  • Biological limits on recovery sleep

To assist the interpretation of FAID Scores consider the following benchmarks:

  • Working Monday to Friday: 9am to 5pm produces a Peak FAID Score of 40
  • Working Monday to Friday: 11pm to 7am produces a Peak FAID Score of nearly 95

Scores between 80 and 100 are equivalent to the predicted level of work related fatigue achieved after 21-24 hours of continuous sleep deprivations (Dawson, Reid, 1997). Performance impairment at such a level of sleep deprivation is comparable to that experienced at a blood alcohol concentration over 0.05% (Fletcher, Lamond, van den Heuvel, Dawson, 2003).

Peak FAID Scores for various Day and Night Shifts

Peak FAID Scores for various Day and Night Shifts

For more information about FAID Quantum and the FAID Score outputs

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