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Quantative Analysis of Accident Incidence and Frequency Rates
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SP900308  
#1 Posted : 03 January 2014 10:39:20(UTC)
Rank: Super forum user
SP900308
Good morning all,
I predict this has been asked previously - so apologies in advance... here goes:

The NEBOSH National Diploma (Module A) course book and the HSG65 (second edition) both show the formula for the aforementioned with the multiplier sitting level at the end of the division line:

32
------------ x 100,000
5600

My interpretation of this would lead me to first divide the top and bottom parameters, then multiply. However, having worked through some examples, it appears the process would be to use the multiplier with the top parameter only (e.g. no. of accidents in period), then divide by the bottom parameter (e.g. no. employed / man hours worked in period):

32 x 100,000
5600


Am I missing something here?

Thanks in advance!

Simon
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A Kurdziel  
#2 Posted : 03 January 2014 10:45:29(UTC)
Rank: Super forum user
A Kurdziel
They are both the equivalent equation
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SP900308  
#3 Posted : 03 January 2014 10:48:00(UTC)
Rank: Super forum user
SP900308
Just realised my error - DOH!

Sorry all

Simple Simon
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JJ Prendergast  
#4 Posted : 03 January 2014 12:19:51(UTC)
Rank: Super forum user
JJ Prendergast
My maths teacher drilled in to 'us' BODMAS
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SP900308  
#5 Posted : 03 January 2014 12:26:15(UTC)
Rank: Super forum user
SP900308
I realised my error just after I hit the post button (may have saved a few blushes if I'd been quicker)! For some reason, the forum wouldn't allow me to post as quickly as I could've, I had to log out first - adding to the misery.

Ah well, back to the study - I'll have forgotten my own name come exam day!

All the best
Simon
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achrn  
#6 Posted : 03 January 2014 12:40:36(UTC)
Rank: Super forum user
achrn
JJ Prendergast wrote:
My maths teacher drilled in to 'us' BODMAS


That's irrelevant to this calculation
(32/5600)*100000
(32*100000)/56000
32*(100000/56000)

You can reverse teh calc if you like: 100000*32/56000 works too. In this calc as long as you divide by 56000 and multiply by 32 and 100000 you can do it in any order you like.
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AllanFS  
#7 Posted : 03 January 2014 14:03:34(UTC)
Rank: Forum user
AllanFS
Accident Incidence Rates.

I hope I do not get this question on the 21st January as my Maths is shocking.
Everything else in the syllabus is fine, until I get this question.
Any advice to tackle this gremlin would be appreciated. Thank You.

Regards

Allan
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JJ Prendergast  
#8 Posted : 03 January 2014 15:46:07(UTC)
Rank: Super forum user
JJ Prendergast
Yes - BODMAS

I agree for this example it doesn't matter in which order you work out the numbers.

But BODMAS is the memory jogger to remember the order of mathematical priority for mathematical operations

Brackets Order Division, Multiplication, Addition, Subtraction

http://www.mathsisfun.co...ration-order-bodmas.html
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