Sorry Forgot to add would subbies fall under No. of hours worked as well? L

Nice one Chris Cheers

The rate is just per unit time. The unit of time you choose is up to you - there's no statutory requirement to report it one particular way, so you can use per million hours, or per hour, or per worker year, or anything you like really.

IOSH recommends 'per 100 people per year', as this is typically a small number but without too many decimal points! But, more importantly, we use such data to communicate performance to non-specialists - and most of them can visualise 100 people, whereas 100,000 (typical HSE data) is too theoretical. Also, very few organisations in today's world actually count worked hours, but they usually do know how many people work for them, including contactors where appropriate. Taking a working year to be 2000 hours (a bit high, but a nice round figure), the IOSH recommendation is also per 200,000 hours, which is how US data is calculated - so you can compare your performance with others that way. UK-based organisations who still calculate using worked hours typically use 100,000 - so you have to be careful with comparisons.

ACCIDENT RATES 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 100 000 employees ) Definition:- number of accidents per 100 000 employees FREQUENCY RATE = TOTAL NUMBER OF ACCIDENTS X 1 000 000/ 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 2 000 000 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 or others use MF of 200 000 as this figure iss 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

Just going slightly of topic here but hopefully relevant - Accident rates were described in the old HSG65 "Successful Health and Safety Management" in which we could have pointed to answer the question, however, I think that the new version doesn't have it in. POPIMAR all the was for me. I hope I haven't hijacked this thread and the discussions go on a different strand than the OP. http://www.google.co.uk/...mp;bvm=bv.84349003,d.d24 I cant believe I found the old version, see link above and Appendix 6.