The problems of SHE performance measurement

Let us evaluate the LTI-rate in relation to the criteria that SHE performance indicators have to satisfy, see Table 11.1. Such an evalnation reveals a number of problems with the LTI-rate that are well known and have been discussed in the literature (see e.g. Rockwell, 1959). 

First we ask whether the LTI-rate is quantifiable and measnrable. This criterion is satisfied, since the LTI-rate is expressed on a ratio scale of measurement and draws from readily available statistics. 

we ask whether the LTI-rate is a valid indicator of the risk of losses dne to accidents. This criterion is more problematic, since the LTI-rate is insensitive to the severity of the injuries. An eye injury resulting in a few days of absence and a severe fall injury with many months of sick leave connt equally when calculating the LTI-rate. It is questionable whether the LTI-rate is a valid indicator of the risk of losses due to accidents. Other SHE performance indicators that we will look into in the next Section are better suited as to validity, since they account for the degree of harm (e.g. number of days of absence). 

Is the LTI-rate robnst against manipnlation Let ns discnss this criterion 

Is the LTI-rate sensitive to change To put the question in another way, will a change in the risk level at a workplace show up in the control chart as a significant jump in the LTI-rate The answer is most often no . This 

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