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Frequency Rate = # lost time injuries X 200,000 divided by hours worked Severity Rate = # DAYS lost due to work injuries X 200,000 divided by hours worked This gives you the number of injuries (or days lost) per 100 people working The terms were used by the National Safety Council unitl the early 70's when they were replaced by "incidence rates"
Number of accidents divided by time.
The question does not have a sensible answer because it does not specifya time-framethe severity of the accident, orthe context (work or home or leisure).In the UK an accident at work is normally notifiable to the Health and Safety authority if it results in an absence from work for three or more days. Other countries have different thresholds.Information on accidents (at home or leisure) was collected until 2002 by the then Department of Trade and Industry under HASS (Home Accident Surveillance System). RoSPA, the Royal Society for the Prevention of Accidents, is continuing the work but on a slightly different basis.Depending on what information you want, you will need to look at one (or more) of these organisations.
It depends to the acceptable risk level in your company. Usually AFR=10 is acceptable in most companies.