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