Statistics severity rate

What is a severity rate What does this statistic measure ... 

Companies and federal officials frequently utilize the following statistical pieces of information designed to allow the company to compare its safety and health performance with others the incident rate, illness rate, lost workday cases rate or severity rate, and restricted workday case rate. These rates, respectively, answer the questions of How often or frequently are accidents occurring and How bad are the injuries/illnesses that are occurring The number of times that occupational injuries/illnesses happen is the determinant for the incident rate, while the number of days away from work (lost-time workdays) or restricted workdays are the prime indicator of the severity rate. Both of these rates provide unique information regarding your safety and health effort. 

For years, safety workers have been targeting frequency in the belief that severity would be reduced as a by-product. As a result, in Australia for example, Freqrrency Rates nationwide have been reduced much more than have Severity Rates. One Australian state reported a 33% reduction in all accidents over a period of 10 years while, dttring the same period, the number of permanent partial disability injrrries actualfy increased. (This cotdd have resulted from a statistical recording change rather than arty real improvemerrt in accident rates.)... 

Accident frequency and severity rates are an inadequate means to evaluate the effectiveness of a health and safety plan. Cases of occupational disease are under-reported in these statistics. The emphasis is on injury-producing accidents, not all accidents. Since accidents are a rare event, in small organizations the basis for comparison may be limited. Chance is a factor both in frequency and severity. 

Under no circumstances should the reduction of severity ratings or lost-time injury statistics be a reason for returning an injured worker to employment. 

Injury rates Health statistics Direct costs Illness rates Investment return Insurance loss ratios Severity rates... 

The S-rate (severity rate) is less sensitive to reporting inaccuracies than the LTI-rate. One single accident resulting in a long period of sick leave may, however, dominate the statistics. It follows that the S-rate may vary considerable from period to period, especially in small companies. Another problem with the S-rate has to do with the fact that the sick leave for an injury may extend into the following periods. The true S-rate is thus not available until all injuries from a period have been closed. Due to the low frequency of fatalities, FAR (fatal accident rate) is rarely useful as a SHE performance indicator other than for very large companies in hazardous branches of industry. 

The importance of solvation on reaction surfaces is evident in striking medium dependence of reaction rates, particularly for polar reactions, and in variations of product distributions as for methyl formate discussed above and of relative reactivities (18,26). Thus, in order to obtain a molecular level understanding of the influence of solvation on the energetics and courses of reactions, we have carried out statistical mechanics simulations that have yielded free energy of activation profiles (30) for several organic reactions in solution (11.18.19.31. ... 

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