The FAID Score Tolerance Level and a KSS Tolerance Level are benchmark figures, set and rostered against in a biomathematical model as an Hours of Work related control. Analysis results are measured against these benchmark figures.
Fatigue Tolerance Levels are usually determined after carrying out a Fatigue Hazard Analysis Risk Assessment. In the absence of a Fatigue Hazard Analysis Risk Assessment, the sample tolerance levels provided in FAID Quantum, or your Apparent Fatigue Tolerance Level can be used as a starting point. However, it is important to determine the appropriateness of these thresholds.
Establishing a Fatigue Tolerance Level provides further details.