Posted By Alan Spiers Nigel, in my opinion total accident, incident FR is best along with number of days lost in a severity rate. Although many get excited about reportables I think total days are much more meaningful as they are a measure of total loss and its only luck that a 1 to 3 day absence does not become a reportable yet if you concentrate on RIDDOR they do not get counted.

Posted By Wendi Gibson OK maybe I need to learn to suck eggs - but why are you using the 100,000 and 10,000 multipliers? Is it just to get a workable size figure?

Posted By Pete Longworth It's mainly to make the figure look more meaningful I think. A company employing 200 people would work approx 30,000 hours a month. Larger companies sometimes use a factor of 1,000,000 but it might just as well be a factor of 10 it doesn't really matter what you use because it's only used to provide a comparison.

Posted By Jay Joshi There are various accident rates used to compare accident statistics. The important factor is to ensure that you use the same multiplying factor as used in the data you are comparing. There is no fixed or standard multiplication factor (MF). The choice can be influenced by either the MF used in the data you are comparing or for the purpose trend analysis/projections, the rates have manageable “numbers”, i.e. not having too many zeros or decimal places! INCIDENT RATE= TOTAL NUMBER OF ACCIDENTS X 1000/ NUMBER OF PERSONS EMPLOYED ( i.e. accidents per 1000 employees ) Definition:- number of accidents per 1000 employees A factor of 100,000 is used by HSE for the “AIR” i.e. number of accidents per 100000 employees Definition:- number of accidents per 100 000 employees FREQUENCY RATE =TOTAL NUMBER OF ACCIDENTS X 1000000/TOTAL NUMBER OF MAN HOURS WORKED i.e. number of accidents per 1 000 000 hours worked) Definition:- number of accidents per 1 000 000 hours worked (Note:- Some tend to use a multiplication factor of 2000000 as this figure is the hours worked in a year by 1000 employees assuming they work 40 hours per week for 50 weeks in a year) SEVERITY RATE=TOTAL NUMBER OF DAYS LOST X 1000/TOTAL NUMBER OF MAN HOURS WORKED (i.e. average number of days lost per 1000 hours worked) Definition:- average number of days lost per 1000 hours worked MEAN DURATION RATE = TOTAL NUMBER OF DAYS LOST/TOTAL NUMBER OF ACCIDENTS(i.e. average number of days lost per accident) Definition:- average number of days lost per accident DURATION RATE=NUMBER OF MAN HOURS WORKED/TOTAL NUMBER OF ACCIDENTS(i.e. average number of man hours between accidents) Definition:- average number of man hours between accidents

Posted By Jay Joshi Most "American" systems use the OSHA Recording criteria, i.e. medical treatment, restricted work, lost time and fatality. Provision of first aid is not OSHA recordable, but has a prescriptive criteria of what constitutes first aid. Any type of accident rate statistic is a rective/lagging indicator. It is best to use both leading and lagging indicators.

Posted By James Larkin Statistics, statistics, statistics - not my cup of tea or pint of beer. I would much rather concentrate on learning from accidents so as to increase the rate of prevention.

Posted By Pete Longworth as I said earlier it doesn't matter if you use 100,000 or 1,000,000 or any other figure, because the result is used for comparison purposes only. As long as you use the same figure as the area you are comparing against.

Posted By sree What is the criteria used for calculating severity rates for fatal/total disablement cases.