 LTIFR=(Number of lost-time injuries ) / (Total hours worked in accounting period)x 1'000'000 Lost- Time Injury Rate (LTIR)
LTIR=(Number of lost-time injuries ) / (Total hours worked in accounting period)x 200'000 DART (Days Away/Restricted or Transfer Rate)
Lost-Time Injury Frequency Rate (LTIFR) (Contractors)