I need to calculate the Accident Frequency Rate for my employer over each of the years 2019 to 2022, seperately. I know there is a formula: Number of reported accidents x ??? / Hours worked

My question is, how do I find the correct ??? figure for the manufacturing industry in UK?

I came across a website that quoted 200,000 as the ??? but it was generic, didn't refer to a year or an industry sector.

Edited by user 27 September 2023 12:54:19(UTC)  | Reason: spelling mistake

200,000 is a significant sweat shop

100,000 hours at 8 hours is 12,500 days, at 5 days is 2,500 weeks, at 50 weeks is 50 years

If we get educated until 18 and retire at 68 (current ages) then 100,000 hours is circa one persons working life

https://www.hse.gov.uk/statistics/lfs/injury.htm

HSE https://www.hse.gov.uk/statistics/adhoc-analysis/injury-frequency-rates.pdf uses 1,000,000 (i.e. one million, 1E6) - see page 2 of the document.

So that's what I use.

But you can use whatever you like - it's one of the reasons why tender questions that just ask 'what is your incident rate' with no other detail are so meaningless.  Next question is do they want rate of serious injury? RIDDOR or more? lost time or more? first aid or more?  or do they want to know the rate including every last paper cut and 'stapled-my-own-thumb' case?  Whatever number you give them it will need a statement about what it is anyway, so pick your own number.

(That HSE document uses 100,000 when calculating the rate per worker, not the rate per hour.  The Labour Force Survey reports injury rates per 100,000 workers, so if you want to compare with per hour figures you need to use e.g. the ONS data about average hours worked by sector.)