A lost time accident is an incident that has resulted in an employee needing to miss work due to sustaining an injury while working.
The formula for calculating LTIR is:
(LTI / Total # of Hours in Measured Period) x 200,000
Divide the total amount of lost time injuries in a specific period by the total number of hours worked in that same period. Then multiple by 200,000 – this represents 100 employees working a 40 hour week for 50 weeks per year (this is the generally accepted baseline of LTI established by OSHA).