The SAFTE model is the world's leading bio-mathematical fatigue model. It's used to generate the SAFTE Alertness score or Effectiveness score, a quantified measure of a person's fatigue. 

Generally speaking, the SAFTE model takes into account a person's sleep history, circadian factors, and sleep inertia. These factors interact in complex ways which the SAFTE model is able to process, then use to make predictions on an individual's fatigue risk and performance effectiveness. 

SAFTE is an acronym for Sleep, Activity, Fatigue, and Task Effectiveness. It's the foundation of the Fatigue Science platform, backed by over $37M and 25 years of applied research by some of the US military's brightest minds.
 
If you'd like to learn more about the SAFTE model and its prediction accuracy, check out the links below: 

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