Work Accident Statistics - Safety Monitoring

Safety monitoring is usually done through work accident statistics, regarding index rates for frequency, incidence, severity, mean duration and duration. Of these, the rates for incidence are the most commonly used. But how are they all calculated? Let's take a look...

Frequency rate
(total number of accidents : total number of man hours worked) x 100.000

Incidence rate
(total number of accidents : number of persons employed) x 1.000

Severity rate
(total number of days lost : total number of man hours worked) x 1.000

Mean duration rate
(total number of days lost : total number of accidents)

Duration rate
(number of man hours worked : total number of accidents)