ABSTRACT
Downstream measures are often termed safety performance, but are not measures of performance, but rather measures of performance failure. These statistics, such as the lost time injury frequency rate, disabling injury incidence rate, and injury severity rate, etc., are really measures of injuries and not measures of safety per se. The disabling injury frequency rate, or lost time injury frequency rate, records the number of disabling or lost time injuries experienced per one million employee hours of exposure. The ratio should be plotted comparing the relationship between: Once the total number of figures has been obtained, a ratio should then be calculated by dividing all the statistics by the number of disabling injuries which will give one disabling injury at the apex of the triangle. These numbers are a measurement of safety activity and should form part of the safety performance indicators.
