In the incidence rate formula, which base value is used for full-time equivalent workers?

In the incidence rate formula, which base value is used for full-time equivalent workers?

• A. 100,000
• B. 50,000
• C. 300,000
• D. 200,000

Answer: (D)

Incidence rate uses a fixed hours base to normalize safety data across different workforces. The standard base is 200,000 hours, which equals 100 full-time employees working 40 hours a week for 50 weeks a year. In the formula, you multiply the number of recordable injuries by 200,000 and then divide by the total hours worked during the period. This yields a rate per 100 full-time equivalent workers per year. For example, with 6 injuries and 300,000 total hours worked, the rate is (6 × 200,000) / 300,000 = 4.0.

Incidence rate uses a fixed hours base to normalize safety data across different workforces. The standard base is 200,000 hours, which equals 100 full-time employees working 40 hours a week for 50 weeks a year. In the formula, you multiply the number of recordable injuries by 200,000 and then divide by the total hours worked during the period. This yields a rate per 100 full-time equivalent workers per year. For example, with 6 injuries and 300,000 total hours worked, the rate is (6 × 200,000) / 300,000 = 4.0.