Which formula best describes the OSHA incident rate per 200,000 hours?

Which formula best describes the OSHA incident rate per 200,000 hours?

• A. (Total # of Injuries and Illnesses / Total# of Hours worked by employees) x 200,000 hours
• B. (Total # of Hours worked by employees / Total# of Injuries and Illnesses) x 100,000 hours
• C. (Total # of Injuries and Illnesses / Total# of Hours) x 100,000 hours
• D. (Total # of Hours worked by employees / Total# of Injuries and Illnesses) x 200,000 hours

Answer: (A)

The main idea is to express a rate that allows comparison across sites by normalizing to a fixed amount of work exposure. OSHA’s incident rate is defined as the number of injuries and illnesses per 200,000 hours of work. That means you take the total injuries and illnesses, divide by the total hours worked to get a rate per hour, and then scale it up by multiplying by 200,000. In algebra, this is the same as (injuries / hours) × 200,000, which is the form shown. This correctly reflects both the count of incidents and the amount of exposure, giving a standardized metric. Using 200,000 as the scaling factor is essential; it turns the per-hour rate into a rate per 200,000 hours, which is a conventional benchmark OSHA uses to compare safety performance across different organizations. The other expressions either invert the ratio (hours over injuries) or use a different scaling base (like 100,000), which would misrepresent the rate and make comparisons invalid.

The main idea is to express a rate that allows comparison across sites by normalizing to a fixed amount of work exposure. OSHA’s incident rate is defined as the number of injuries and illnesses per 200,000 hours of work. That means you take the total injuries and illnesses, divide by the total hours worked to get a rate per hour, and then scale it up by multiplying by 200,000. In algebra, this is the same as (injuries / hours) × 200,000, which is the form shown. This correctly reflects both the count of incidents and the amount of exposure, giving a standardized metric.

Using 200,000 as the scaling factor is essential; it turns the per-hour rate into a rate per 200,000 hours, which is a conventional benchmark OSHA uses to compare safety performance across different organizations. The other expressions either invert the ratio (hours over injuries) or use a different scaling base (like 100,000), which would misrepresent the rate and make comparisons invalid.