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RR446 – The development of a fatigue / risk index for shiftworkers

This report describes the work carried out to revise and update the HSE Fatigue Index (FI). Extensive changes have been made to the previous version, incorporating recent information relating to a variety of issues including cumulative fatigue, time of day, shift length, the effect of breaks and the recovery from a sequence of shifts. In addition, a review has been carried out of trends in risk related to shift work, and this has enabled the final version to incorporate two separate indices, one related to fatigue (the Fatigue Index) and the other to risk (the Risk Index).

View Research Report 446