Construction Health and Safety Technician (CHST) Practice Test 2025 – All-in-One Study Guide for Exam Success!

Total case incident rate (TCIR) is a critical metric used in occupational safety to provide a standardized way to measure the incidence of work-related injuries. The formulation of TCIR is designed to reflect the number of recordable injuries in relation to the hours worked, allowing for comparisons across differing work environments and scales.

The correct formula involves multiplying the number of recordable injuries by a factor (200,000) to standardize the metric, which is representative of the total hours 100 individuals would work in a year, assuming a standard 40-hour work week over 50 weeks. This number (200,000) acts as a normalization factor to yield a rate that is more meaningful in terms of risk assessment. The total hours worked provides the denominator, ensuring that the rate is proportional to the actual exposure or activity level of the workforce.

In summary, the calculation for TCIR effectively accounts for the frequency of injuries per a standardized number of hours worked, making it a useful tool for comparing safety performance across different workplaces and industries.