Incident and DART Rate Calculations questions for the CSP
CSP11 Domain 2: Program Management (2.7 Evaluate leading and lagging indicators; 2.14 Analyze data). 4 free questions below. Every answer quotes and links the formula source it rests on.
Question 1Calculation
A manufacturing plant logged 23 OSHA-recordable injury and illness cases last year. Its 430 employees worked a total of 864,000 hours. What is the plant's total recordable incidence rate per 100 full-time workers?
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Answer: A. 5.32
Incidence rate = (N x 200,000) / hours worked = (23 x 200,000) / 864,000 = 5.32. The 200,000 base represents 100 employees working 40 hours a week for 50 weeks. Using 100,000 as the base would give half the correct value.
Answer A rests on
BLS, How To Compute Your Firm's Incidence Rate for Safety Management(opens ecfr.gov in a new tab)“(Number of injuries and illnesses X 200,000) / Employee hours worked = Incidence rate (The 200,000 hours in the formula represents the equivalent of 100 employees working 40 hours per week, 50 weeks per year, and provides the standard base for the incidence rates.)”
Question 2Calculation
A manufacturing plant logged 12 OSHA-recordable injury and illness cases last year. Its 450 employees worked a total of 912,000 hours. What is the plant's total recordable incidence rate per 100 full-time workers?
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Answer: B. 2.63
Incidence rate = (N x 200,000) / hours worked = (12 x 200,000) / 912,000 = 2.63. The 200,000 base represents 100 employees working 40 hours a week for 50 weeks. Using 100,000 as the base would give half the correct value.
Answer B rests on
BLS, How To Compute Your Firm's Incidence Rate for Safety Management(opens ecfr.gov in a new tab)“(Number of injuries and illnesses X 200,000) / Employee hours worked = Incidence rate (The 200,000 hours in the formula represents the equivalent of 100 employees working 40 hours per week, 50 weeks per year, and provides the standard base for the incidence rates.)”
Question 3Calculation
A warehouse recorded 18 OSHA-recordable cases in a year: 3 with days away from work, 3 with job transfer or restriction only, and 12 other recordable cases. Employees worked 610,000 hours. What is the DART rate (days away, restricted, or transferred) per 100 full-time workers?
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Answer: A. 1.97
DART uses the same formula as the total recordable rate but counts only cases with days away, restriction, or transfer: (3 + 3) x 200,000 / 610,000 = 1.97. Including the 12 other recordable cases gives the total recordable rate instead.
Answer A rests on
BLS, How To Compute Your Firm's Incidence Rate for Safety Management(opens ecfr.gov in a new tab)“The same formula can be used to compute the incidence rate for the most serious injury and illness cases, defined here as cases that result in workers taking time off from their jobs or being transferred to another job or doing lighter (restricted) duties.”
Question 4Calculation
A warehouse recorded 8 OSHA-recordable cases in a year: 6 with days away from work, 0 with job transfer or restriction only, and 2 other recordable cases. Employees worked 430,000 hours. What is the DART rate (days away, restricted, or transferred) per 100 full-time workers?
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Answer: B. 2.79
DART uses the same formula as the total recordable rate but counts only cases with days away, restriction, or transfer: (6 + 0) x 200,000 / 430,000 = 2.79. Including the 2 other recordable cases gives the total recordable rate instead.
Answer B rests on
BLS, How To Compute Your Firm's Incidence Rate for Safety Management(opens ecfr.gov in a new tab)“The same formula can be used to compute the incidence rate for the most serious injury and illness cases, defined here as cases that result in workers taking time off from their jobs or being transferred to another job or doing lighter (restricted) duties.”
28 more incident and dart rate calculations questions in the full CSP bank
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