Fatigue in Aviation. Fatigue Risk Management System, an Alternative Approach

It is commonly known that pilot fatigue is a significant issue in modern aviation operations, mainly because a number of complex and different factors are involved, such as work shifts, long duty periods, the unpredictable working hours, circadian disruptions, and last but not least, insufficient sleep. The full impact of fatigue is not perfectly understood but many of its deleterious effects have long been known.