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August 29th, 2017, 05:59 AM  #1 
Newbie Joined: Aug 2017 From: Chile Posts: 3 Thanks: 0  Calculating An Injury Frequency Rate
Hello everyone, I believe I have this down but wanted confirmation from the experts. Seems simple enough. Basically, I want to calculate the "Total Recordable Injury Frequency Rate (TRIFR)" of a company per 200,000 work hours. Assuming 1 employee= 2000 hours worked What would be the TRIFR per 200,000 work hours if the company had the following. 2016: 2422 employees; 40 accidents 2015: 2316 employees; 40 accidents 2014: 2197 employees; 29 Accidents Thank you all 
August 29th, 2017, 06:39 AM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 2,500 Thanks: 1371 
rate per 200000 hours, when 1 employee works 2000 hours, is equivalent to rate per 100 employees. So divide the number of employees by 100 to get the number of 200 khrs and just read off the number of accidents for that period. For example in 2016 2422 employees is equivalent to 242.2 200 khrs. So we have 40 accidents per 242.2 200 khrs = 40/242.2 = 0.165 accidents per 200 khr. I'm sure you can complete the other years. 
August 29th, 2017, 06:50 AM  #3 
Newbie Joined: Aug 2017 From: Chile Posts: 3 Thanks: 0 
Thanks for the quick reply Wouldn't 2422 employees be equivalent to 24.2 not 244.2? 2422 /100. Or do we divide by 10 and not 100? 
August 29th, 2017, 07:08 AM  #4 
Senior Member Joined: Sep 2015 From: USA Posts: 2,500 Thanks: 1371  
August 29th, 2017, 07:12 AM  #5 
Newbie Joined: Aug 2017 From: Chile Posts: 3 Thanks: 0  It's ok, I appreciate the help. It's the same figure I got, only I did it way longer jajaja. Thank you once again.
Last edited by skipjack; August 29th, 2017 at 02:14 PM. 

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calculating, frequency, injury, rate 
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