Enter the number of lost time incidents and the total employee hours worked into the calculator to determine the lost time incident rate.
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Lost Time Incident Rate Formula
The following equation is used to calculate the Lost Time Incident Rate.
LTIR = (LT × 200,000) / T
- Where LTIR is the lost time incident rate (incidents per 200,000 hours)
- #LT is the number of lost time incidents
- T is the total employee hours worked
- 200,000 is a common benchmark representing 100 employees working 40 hours per week over 50 weeks
To calculate the lost time incident rate, multiply the number of lost time incidents by 200,000, then divide by the total employee hours worked.
What is a Lost Time Incident Rate?
Definition:
Lost time incident rate (LTIR) measures how often incidents occur in the workplace that result in an employee missing work. It standardizes this frequency for easier comparison across different workforce sizes and time periods.
How to Calculate Lost Time Incident Rate?
Example Problem:
The following example outlines the steps and information needed to calculate the Lost Time Incident Rate.
First, determine the number of lost time incidents. In this example, there were 5 lost time incidents recorded.
Next, determine the total employee hours worked. Here, the total hours worked are 250,000 hours.
Finally, calculate the lost time incident rate using the formula above:
LTIR = (#LT × 200,000) / T
LTIR = (5 × 200,000) / 250,000
LTIR = 1,000,000 / 250,000 = 4 (incidents per 200,000 hours)
FAQ
What factors can affect the lost time incident rate?
The rate can be influenced by the nature of the work, safety protocols in place, training programs, and workforce experience or skill level. Industries with heavier physical labor or hazardous environments often see higher rates than those in office settings.
Why is tracking LTIR important?
Organizations track lost time incident rates to monitor workplace safety trends, identify potential problem areas, and assess the effectiveness of safety programs or interventions. A lower LTIR typically indicates a safer work environment.
How can companies reduce their LTIR?
Implementing comprehensive safety training, conducting regular inspections, encouraging a culture of safety, and promptly addressing hazards are all effective methods to help lower the lost time incident rate.