CAIRS Rate Calculations
Occupational injury and illness incidence rates are calculated from summary records using the following information:
An incidence rate of occupational injuries and illnesses [Total Recordable Cases] may be computed using the following formula:
(Number of injuries and illnesses X 200,000)/Employee hours worked = TRC Incidence Rate
Note: The 200,000 in the formula represents the equivalent of 100 employees working 40 hours per week for 50 weeks per year, and provides the standard base for incidence rates. The same formula can be used to compute incidence rates for:
The fatality rate measures the number of fatalities per 100,000 worker-years and is calculated by multiplying the number of fatalities by 200,000,000 and dividing by the total hours worked, as follows:
(Number of fatalities X 200,000,000)/Total hours worked = Fatality Rate
Note: The factor of 200,000,000 represents 100,000 workers who each work an estimated 2,000 hours per year.
Property loss rates for the DOE are shown in dollar loss per $10,000 valuation. The calculation of property loss rates are made by summing all DOE damage and/or loss in dollars recorded and dividing by the total estimated property valuation in ten-thousands of dollars for the organizational entity involved, as follows:
(Total DOE dollar loss X 10,000)/Total property valuation = Loss Rate
Property loss rates can be calculated for the total loss or for fire losses and non-fire losses. Since the property valuations are estimated and revised on an annual basis and since the losses are summed over time, the loss rates are considered time dependent. Comparisons should therefore be made against similar time periods.
The DOE vehicle accident rate is the number of accidents experienced per million vehicle miles and is calculated as follows:
(Number of vehicle accidents X 1,000,000)/Total mileage = Vehicle Accident Rate
The DOE vehicle loss rate represents the dollar loss per 1,000 miles of vehicle travel and is calculated as follows:
(Total dollar loss in vehicle accidents X 1,000)/Total mileage = Vehicle Loss Rate
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