OSHA Recordkeeping

Anyone that works in manufacturing such as myself has to deal with OSHA guidelines for safety. One such guideline is that all accidents and injuries have to be reported for statistics. Two of the figures that OSHA requires are ORI (Osha Recordable Injury Frequency) and TIF (Total Injury Frequency); or variations with similar names.

The formula to calculate ORI is:

(total # of OSHA Recordable Injuries) * 200,000 / (total # of man-hours worked)

The formula to calculate TIF is:

(total # of accidents) * 200,000 / (total # of man-hours worked)

My question is:

Where does the conversion figure of “200,000” come from? It seems arbitrary to me.

The incident rates are supposed to be per 100 employees per year. The 200,000 would be about the number of hours 100 full-time employees would work in one year.