safeworkaustralia. It’s all below in our DART rate calculator. R. Federal jurisdiction covers: any work, undertaking or business that is within the legislative authority of Parliament ;A Lost Time Incident Rate calculator is a standard OSHA metric that calculates the number of incidents that result in time away from work. The formula for calculating your accident frequency rate is the number of reported accidents multiplied by 200,000, divided by the number of employee hours worked. Sorry I meant to say its the incidence rate not frequency rate. 5 Minor Injury rate2 (Minor Injury rate [N]3) 376 (n. Safe Work Australia is proud to announce the full release of our data website, data. incidence are risks and rates. Perhitungan TRIR Menurut IADC IADC (International Association of Drilling Contractors) menggunakan istilah Frequency Rate dan Incident Rate. Injury Severity. TRIF stands for total recordable injury frequency, sometimes termed total recordable injury rate or simply total recordable rate. Incidence Rate: A measure of the frequency with which a disease occurs in a population over a specified time period. Study with Quizlet and memorize flashcards containing terms like Turn to page 50 in the text. The number 200,000 is used to represent 100 employees working 2,000 hours per year, as the rate that results from this formula is designed to represent the number of lost. Number of accidents. The lost time injury severity rate calculation is: Total number of lost workdays/Total number of OSHA recordable incidents. Vehicle Accident Frequency Rate = (Number of Accidents x 12) = Number of (Number of Vehicles x number Accidents per Year of months in period covered) The total number of vehicles should include only power units (automobiles, trucks, tractors) and not trailers. The “Lost Time Case Rate” (LTC) is the second most commonly. Feedback can also be emailed to [email protected] injury severity rate represents the number of lost work days experienced per 100 workers. Conclusion: If we were to research 1,000 businesses in a one-year period, there would approximately be 10 businesses that are forced into bankruptcy. The output of this all injury frequency rate calculation is your AIFR 'score' and indicates how many injuries are suffered when standardised across 100 employee working 40 hours per week for one year. To calculate the incidence of the same hypothetical study used above, the following information is used:. A lost time accident is an accident occurring at work that results in at least one day's absence from work, not including the day that the accident occurred. The accident rate is defined as the ratio between the number of accidents which happened in a given year and the number of flights conducted during that same year. Frequency of Workplace Accidents 4 Accident Frequency Rate (AFR) 5 = No. i. Please visit the website and fill out the short online. We would then need to calculate the total time at risk; in this case the total time on HD. Lost Time and Recordable Incidents are utilised for measuring Lost Time Injury's (LTI's) and Total Recordable Incidents (TRI) reporting respectively, other injury types are captured (reportable) but are not used in the calculation of any frequency rates. Publication Date: 2016 Asset type: Calculator. Occupational Safety and Health Administration defines incidence rate as the number of injuries/illnesses × 200000/employee-hours worked, where 200000 represents the equivalent of 100 employees working for 40 hrs per week, 50 weeks per year. a. 5 have experienced lost time due to an incident. This calculation includes indirect and direct costs to give you a more complete understanding of the costs of a single accident. However, the level of risk involved across different occupations varies greatly. Then divide by the total number of employee hours worked in the year. Employee Labor Hours Worked. The TCR. Total case incident rate: The number of work-related injuries per 100 full-time workers during a one year period. of Workplace Accidents Reported x 1,000,000 No. In some publications, epidemiologists may use incidence to mean the number of new cases in a community whilst in others, it means the number of new cases per unit of population. Part 1 - Measures of Disease Frequency. If employees have taken a total of 11 days away from work, spread over 4 recordable. After reviewing and compiling your safety data, you’ve determined that there were six lost time injuries in the past year at your manufacturing company and a total of 2,500,000 hours worked. a year. Total Case Incident Rate (OSHA Recordable Incident Rate) TCIR. A question ' How often do injuries occur?' is replied by the frequency rate which is defined as the disabling (Fatal Accident) injuries per 1000000 (Million) man-hours worked. In epidemiology, this metric is widely used to indicate the occurrence of ailment, sickness, or an incident. 7% higher. 1 Therefore, the calculation of. The calculation is based on the number of mandatory reported OSHA recordable injuries and illnesses. Multiply the results by 200,000 (this is the generally accepted baseline of LTI established by OSHA; it represents 100 employees working 50 weeks or. Our Workplace Incident Cost Calculator shows the direct and indirect costs employers may face due to a work-related injury in a variety of industries. PAMCOMP Person-Years Analysis and Computation Programme for calculating standardized incidence rates (SIRs) This page was last edited on 21. The 2,000 used to calculate TRF stands for the average amount of hours worked in a year by any given individual, based on the assumption that they will work 40 hours each week and work for 50 weeks. This number can indicate the frequency of OSHA injuries and illnesses over time. 9 Man-days Lost4 530,961 544,664 Per 100,000 workers A workplace injury is any personal injury or death resulting from a workplace accident, including work-related traffic injuries. 4 *preliminary data subject to revision in future years as further claims are finalised. 1. Incidence rates pertain to the number of new injuries that occur in a population at risk over a specified time period or the number of new injuries during a period divided by the. of Fatal and Non-Fatal Workplace Injuries No. The Lost Time Injury Frequency Rate (LTIFR) is a measure used to quantify the frequency of Lost Time Injuries against the total hours worked over a. That is obviously unrealistic, especially for big companies with many employees. The index is calculated in Eq. Even though lagging indicators like these don’t. 8 15. commonly expressed as either disease incidence (proportion of the total number of plants that are infected) or disease. This measure reflects both frequency and severity, yielding a combined index of total disabling injury (ANSI Z16). Notes on engagement rate Engagement rates are a particularly important indicator as they help us to understand developments in workers’ willingness to report incidents and observations. Now, to calculate the LTIIR (Lost Time Injury Incidence Rate) which is the number of LTIs per 100 (or whatever figure you want) employees we just substitute the number of employees for the number of hours and multiply the number of LTIs by the standardizing factor which is 100. To give you an idea of companies and use cases on the higher end of the total recordable injury frequency rate spectrum, In Australia, the companies with the highest TRIFR in 2017 were WesFarmers (28. The number 200,000 is used to represent 100 employees working 2,000 hours per year, as the rate that results from this formula is designed to represent the number of lost. Formula. 1 in 2018, according to the Bureau of Labor Statistics. Tracking certain safety metrics like Total Recordable Incident Rate (TRIR), Days Away, Restricted & Transfer Rate (DART), Lost Time Incident Rate (LTIR), Injury Severity Rates, First Aid Cases and Near Misses is a universal activity that nearly every company in every industry participates into some extent. frequency rate, which is limited to the number of fatalities and lost time. of man hours worked. Using this TRIFR calculation formula, the result is the total recordable injury frequency rate. The output of this all injury frequency rate calculation is your AIFR 'score' and indicates how many injuries are suffered when standardised across 100 employee working 40 hours per week for one year. Using this TRIFR calculation formula, the result is the total recordable injury frequency rate. 2. After successfully completing this section, you will be able to: Define, calculate and interpret measures of disease frequency: prevalence, risk (cumulative incidence) and incidence rate. Incidence rates (density) can be measured in a closed cohort or in an open population. Where 200,000 is the # of hours worked in a calendar year by 100 employees and 400,000 is the total # of hours worked in a calendar year by all employees. The accident rate gives an estimate of the accident risk per flight. OSHA Incident Rate Calculator" title="SMG Utilities Services. The reason for calculating an accident frequency rate is to. 1 14. 001295. 2. The longer companies are in the Avetta network, the safer they become. It is an indicator of the state of health and safety at a workplace. 00% . 1 0. LTIFR calculation formula. Accident frequency rate is one of the standard safety measures which companies use to identify and analyse the number of occupational accidents which take place in the workplace. How to Calculate Lost Time Injury Rate – Lost Time Injury rate follows a simple formula to indicate your performance. Calculate the total number of accidents occurring during each year by dividing it by 1000 (or any other unit you use); This gives you an idea as to how many times per day or week someone will have an accident while at. If an injury causes intermittent fatality, it should only be. The formula to calculate IFR is as follows: IFR = (Total Number of Incidents / Total Hours Worked) x 100,000. The formula is: Accident Rate = (Number of accidents X 200,000) / Employee hours workedTotal Lost Work Days * 200000/Total Hours worked. Total number lost workdays SR =. 0 or under as the average TRIR across the board was 3. So, a company with 85. Moreover, some market research and medical research websites have also developed incidence rate calculators to help calculate the rate. Total recordable incident rate (TRIR) is one of many safety indicators used to evaluate the effectiveness of a company’s safety efforts. The 200,000 figure represents the total hours 100 employees would work over the course of 50. Here's how this formula works: TRIR Rate =. So, the rate of pain relief was greater in the group receiving the new drug. There are others but I think this is what you are trying to calculate. 1-866-777-1360 M-F 6am - 4pm PST. The 200,000 is the benchmark established by OSHA because it represents the total number of hours 100 employees would log in 50 weeks based on a 40-hour work week. In many countries, the. To give you an idea of companies and use cases on the higher end of the total recordable injury frequency rate spectrum, In Australia, the companies with the highest TRIFR in 2017 were WesFarmers (28. It is calculated in the following manner: (Number of Reportable Injuries in the period / Total hours worked (by all employees) during the period) x 1,000,000. 6 fatalities per 100,000 full-time equivalent (FTE) workers, up from 3. Generally, a lower TRIR (a rate of zero being perfect) signifies that a company has a better safety performance. TRIR-Rolling = CALCULATE ( DIVIDE ( CALCULATE(COUNT ( INJ[Incident Type] ); 'INJ'[Incident Type] IN { "Recordable. And voila!Downer’s Total Recordable Injury Frequency Rate (TRIFR) for FY22 was below target at 2. 4. Our accident calculator uses the following incidence rate formula: TRIR = (Number of recordable injuries × 200000) / Hours worked. The Injury Frequency Rate indicates the number of Reportable Injuries employees are likely to have for every 1,000,000 hours worked. (You will find the term "rate" used inconsistently in epidemiologic reports. AIFR = (Reported injuries x 200,000) / Employee total hours worked The output of this all injury frequency rate calculation is your AIFR 'score' and indicates how many injuries. 100. Industry benchmarking. The total hours worked in this period (for all employees) was 800,000. g. AFR = (Accidents * 100,000)/total hours worked. Result: 2 * 1,000,000 / 111,200 = 17. Total number of hours worked by all. Of course, this number varies per industry but in 2020, the average OSHA incident rate within private industries was 2. Start Free Trial. In a strict application, "rate" should only be used when the denominator is an estimate of the total person-time at risk. The Basics of TRIR Calculation. Sol. Visit Discussion Forum for Online LTIF Calculator tool. Register To Reply. Risks and rates can be further manipulated to provide additional information on the effects of the exposure of interest, such as risk ratios, rate ratios, attributable risks (risk or rate differences) and attributable risk percent. 200,000 represents 100 employees working 40 hours per week. Total for sectors A, C-N (refpop. The “Lost Time Case Rate” (LTC) is the second most commonly. With good intentions in mind, let’s hack the TRIF. An incidence rate of injuries and illnesses may be computed from the following formula: (Number of injuries and illnesses X 200,000) / Employee hours worked. 15 per 1000 population). set the amount of employees employed by the. of Man-hours Worked 4. Incidence can also be expressed in terms of person-time at risk. The total number of registered patients was 1,223,818 representing 1,145,726 person-years. Lost time frequency rate (LTIFR) shows the average number of injuries occurring. Incidence Rate Worksheet for _____ Company Incidence Rate Columns from OSHA 300 Log 300 Log Column Entry Calculation Year Company RateIf a company had 5 recordable injuries in a year, and the total number of hours worked by all employees during the year was 500,000: OSHA Incident Rate = (5 × 200,000/500,000) = 2. In a closed cohort (1) Count person-time for each individual in the cohort and sum (e. Objective: Background incidence rates are routinely used in safety studies to evaluate an association of an exposure and outcome. The Lost Time Injury Fatality Rate calculator can now be seen on the Data website. 1%. The severity rate calculation from here would be: Severity rate = (25 lost work days x 200,000) / 2,000,000 hours worked = 1 lost day per accident. Safety Index. 2. Explain the interrelationship among prevalence, incidence, and average duration of disease (i. The total recordable incident rate is not a complex calculation to comprehend. 2,354. These differed from 15. Total number of injuries and illnesses (annually) x 200,000 /. Accident frequency rate is defined as the number of deaths and injuries in occupational accidents × 1000000/aggregate number of human-hours, and accident severity as the number of workdays lost. Whatever the type of injury, a high injury frequency rate within business operations must be addressed to further improve the facility’s safety program. 0 18. This is how the TRIF is calculated:incidence rates. The result is then multiplied by 200,000. 3 Location 2. If your employees lost a total of 24 workdays, and there had been a total of four incidents, you’d be able to tell that the average incident cost you 6 workdays. au. In all other cases frequency rate F, should be used for comparison purposes. The most common rate used is the Recordable Incident Rate. 1 injury. The 2019 federal jurisdiction DIFR is 9. The incident frequency rate for all recordable incidents that generally includes reportable cases. - AFR (Accident Frequency Rate). Multiply that number by 200,000, which represents the number of hours worked by 100 full-time employees, 40 hours per week for 50 weeks per year. An LTI refers to any injury sustained by an employee that results in them missing at least one full day of work after the day the injury occurred. And voila! The Basics of TRIR Calculation. The formula to calculate the Lost Time Injury Frequency Rate is as follows:. If you multiply 3 times the 200,000 figure, you get 600,000. Here are some benchmarks: A perfect TRIR is 0, the product of zero employee accidents/incidents. The Lost Time Injury Fatality Rate calculator can now be seen on the Data website. Crude Death Rate (U. Complete the table and calculate the following: (a) Total injury incidence rate (b) Total illness incidence rate (c) Number-of-lost-workdays rate (d) LWDI. The Total Case Incident Rate (TCIR) is defined as the number of work-related injuries per 100 full-time workers during a one year period. This includes the cumulative hours worked by all employees during the specified period. 0 ± 22. For instance, if you had two cases where an employee missed work from a workplace accident, your DART would also be 2. It could be as little as one day or shift. Incidence rates are calculated using the total case counts obtained through the weighting and benchmarking procedures described above. 55 in 2006 to 0. 2. Severity rate= days lost in a year due to accidents/number of man. Now add these values to the formula for calculating incidence rate: Incidence rate formula = 2 / 50,000 x 100,000 = 0. Floor Marking. I wrote a formula in DAX that calculates the incident rate for a given type of injury called "Recordable Injury" which is (injuries x 200,000)/Total Hours Worked. What are the benefits of benchmarking incident rates? Benchmarking incident rates against industry standards allows organizations to identify areas that need improvement and stay competitive in. DART does not calculate the number of days lost. 2. Telephone Toll-Free: 1-855-282-9222 or 416-581-8875. TRIF - Total Recordable Incident Frequency. Total case incident rate: The number of work-related injuries per 100 full-time workers during a one year period. For instance, a higher-than-average TRIF could result in boosted insurance rates, or surprise safety inspections. As an example total case incident rate calculation, if a company had 2 recordable cases during the year and 1,000,000. A good TRIR is less than 3. e. 80000 hours. 9% from 2020 12/16/2022 There were 5,190 fatal work injuries recorded in the United States in 2021, an 8. The formula can also be multiplied by 1,000,000 to get the injury frequency. The formula for calculating your accident frequency rate is the number of reported accidents multiplied by 200,000, divided by the number of employee hours worked. This is calculated by: number of employee RIDDOR injuries / total hours worked x 100,000). Number of Man-days Lost Due to Workplace Accidents Accident Severity Rate (ASR) = No. 99. This calculation will give you your collision ratio or your accidents per million miles. Each set combines both employee recordableAnalyzed in detail as below. of Occupational Disease Cases workersRe: Total Recordable Injury Frequency Rate (TRIFR) Sorry forgot the formula. 5 days off work over the reporting period. 6 fatalities per 100,000 full-time equivalent (FTE) workers, up from 3. 3), Qantas (24. Risk is defined as the number of new cases divided by the total population-at-riskTo calculate your lost time incident rate, follow this simple formula: Divide your total number of lost time injuries (in a given time period) by the total number of hours worked (in that period). 4. c. This means that for every one million hours worked in the facility, there are 40. Incident rates are collected on a per-company basis and are then aggregated by industry, demographics, and other. 1. 0104 or approx. OSHA recordable incident rate is calculated by multiplying the total recordable incident during a calendar year by 200,000, divided by the total number of hours worked during the calendar year. The formula itself is quite simple, but its implications can be pretty significant. Downer’s Lost Time Injury Frequency Rate (LTIFR) was also below target at 0. Don’t over-report injuries. An LTI refers to any injury sustained by an employee that results in them missing at least one full day of work after the day the injury occurred. g. To calculate the incidence rate, we use this incidence rate calculator: Total number of new cases = 1; and; Total population at risk = 50,000. In medicine, the incidence is commonly the newly identified cases of a disease or condition per population at risk over a specified timeframe. For example, if all your. Centers for Disease Control and Prevention 1600 Clifton Rd. DART Rate. Some people confuse this formula with the formula for lost time injuries, but the total recordable injury frequency rate includes all injuries requiring medical treatment from a medical professional - which in theory means that it will be a larger number. 9-percent increase from 4,764 in 2020. Author: CADDY,Isabella Last modified by: CADDY,Isabella Created Date: 12/5/2022 2:06:46 AM Other titles: LTIFR (2018-19 to 2020-21p)The TRIR or TRIF (Total Recordable Incident Frequency) is a measure of the rate of time-loss injuries in a workplace. Using these documents, simply plug in the number of recordable injuries and illnesses with total hours worked to find your OSHA incident rate. Lost Time Case Rate. This is commonly called either the “total case incident rate” or just the “incident rate”. Duration Rate = No of Man hours worked/Total No of accidents. RULE 1050NOTIFICATION AND KEEPING OF RECORDS OFACCIDENTS AND/OR OCCUPATIONAL ILLNESSESReports made by the employer shall be exclusively for. The lost time injury rate (LTIR) of an organization, a jobsite, or a department is calculated using a simple formula. For instance, a higher-than-average TRIF could result in boosted insurance rates, or surprise safety inspections. Calculate the Lost Time Incident (LTI) Frequency Rate using this formula: [Number of Lost Time Incidents (LTI) including Fatalities (FTL) multiplied by 1,000,000 and then divided by Total Hours Worked = Lost Time Frequency Rate]. LTIFR calculation formula. 9-percent increase from 4,764 in 2020. F = (Number of First-Aid injury x 1000. A TRIR of 12. Once reported, an investigation of the incident occurs. The formula for calculating a company's incident rate is fairly simple to complete: (The number of incidents in a year x 200,000) / the total number of hours worked by all team members in a year = incident rate. This is below industry benchmarks published by Safe Work Australia for all. The total case incident rate (TCIR) is a figure that represents the number of work-related injuries per 100 full-time workers over the course of a year. It is an indicator of the state of health and safety at a workplace. 7) and Star Entertainment Group (22. A TRIR rate is a measure of the number of recordable incidents per 100 full-time workers during a one-year period. Severity Rate (S. 9 TRCF. You can also customize with your own values. The formula can also be multiplied by 1,000,000 to get the injury frequency. It may also be calcu-lated as the ratio of the total days lost and. Total of 5,190 fatal work injuries in 2021, up 8. 0 18. 7) and Star Entertainment Group (22. 80000 hours. 1 x 100,000 divided by 80,000 = accident frequency rate of 1. (1) (1) T R I R = N E H × 200,000. Then use the tool below to calculate your company’s rate. 0 20. The 'result' of the measurement, the total recordable incident rate, is derived from combining the number of safety incidents and total work hours of all employees with a standard employee group; typically 100 employee working 40 hours a week for 50 weeks of the year. gov. There are others but I think this is what you are trying to calculate. For example, in 2018 the average total recordable incident rate for a construction company was 3. The formula is given as: (Number of lost-time injuries in the accounting period x 1,000,000) / (Total hours worked in the accounting period) To make. Therefore, Incidence charge, IR = Re/Rt *100. Rank: Super forum user. To calculate your LTIFR, simply plug those numbers into your formula: (6 x 1,000,000) / 2,500,000. 4. 0. Time-at-risk Exposure-adjusted Incidence Rate Total Person Treatment A Treatment B -years at Risk n (e) years at Risk Diarrhoea 102. Recordable Incidents x 200,000. Lost time injury rate is a calculation used to determine the frequency of lost time injuries (LTIs). 1 in 2021 (which was the same rate as pre-COVID year 2019). The Injury Frequency Rate indicates the number of Reportable Injuries employees are likely to have for every 1,000,000 hours worked. OSHA calculates this number as a rough measure of a company’s safety performance. Visit Discussion Forum for Online TRCF Calculator tool. 35 which was an improvement on 2. The fatal work injury rate was 3. 39. govBy analyzing the data, the occupational accident weight rates and occupational accident frequency rates for years were determined and compared without making any sectoral discrimination. AIFR = (Reported injuries x 200,000) / Employee total hours worked. Rt= total selected population for the survey. Explain : Lost Time Injury Frequency Rate (LTIFR)When assessing safety performance, one of the most important KPIs to track is lost time injury frequency rat. 3 per 100,000 workersIncidence Rate = Total no. 08 28,400 28,400 For every 100 employees, 14. Divide the number of accidents by the man-hour value to calculate the number of accidents per a working hour. TRIR Calculation: Learn about how to reckon your Total Recordable Incident Rate. 9. Rate Calculation: An incidence rate of injuries and illnesses is computed from the following formula: (Number of injuries and illnesses x 200,000) / Employee hours worked = Incidence rate. Validate all Inputs 3. Lost time injury frequency rates are one measure that can help you compare part of the. For example, if you had 1 recordable incident out of 10,000 hours worked in a year. The total hours worked by allThe calculation of a business’s lost time injury frequency rate (LTIFR) is done by multiplying the total number of LTIs by one million and then dividing the resulting number by the total number of hours worked during the reporting period. The difficulties often encountered when calculating LTIFR, TRIFR and other safety indicators are not with the calculation itself but with the data. 4 What do we need to calculate pressure ulcer incidence or prevalence rates? To calculate pressure ulcer incidence or prevalence rates, whether at the unit level or at the overall facility, you need to know who has a pressure ulcer and when it developed. =. safeworkaustralia. Please visit the website and fill out the short online. Total Number of Hours Worked. The formula is as follows: ( [Number of lost time injuries in the reporting period] x 1,000,000) / (Total hours worked in. 3. AIFR = (Reported injuries x 200,000) / Employee total hours worked. 2 Process Safety Indicator Criteria 2. 4 per 100,000 FTE in 2020. A similar term, incident rate, calculates all accidents and illnesses, but the DART rate calculates recordable loss rate. Number of work-related injuries × 1,000 / Average number of employees. [Source: Self-reports from the Labour Force. E. The mean age of the population was 40. S = (7,872 x 106)/2,189,234 = 3,596 days lost and charged per million employee hours of exposure. : ABC Manufacturing Company’s Frequency Rate is 40. 9 TRCF. F = (Number of Fatal Accident injury x 1000000) / Number of manhours worked. 9 Major Injury rate 18. 2. Synonyms. TRIR serves as a retrospective gauge often utilized to quantify a company's safety record, and its computation can be achieved through the formula provided or by utilizing the TRIR calculator furnished below. An incidence rate of injuries and illnesses may be computed from the following formula: (Number of injuries and illnesses X 200,000) / Employee hours worked. 82, which is an improvement on the FY21 result of 0. Atlanta, GA 30333, USA 800-CDC-INFO (800-232-4636) TTY: (888) 232-6348, 24 Hours/Every Day - cdcinfo@cdc. 2. (N/EH) x 200,000 <class=bold>=. Total of 5,190 fatal work injuries in 2021, up 8. On the other end of the spectrum, some companies had a perfect 0 TRIFR, while WorleyParsons. Visit Discussion Forum for Online Accident Incident Rate Calculator tool. This includes the cumulative hours worked by all employees during the specified period. of Workers No. g. Because of this, TCIR is also known as OSHA incident rate. The output of this all injury frequency rate calculation is your AIFR 'score' and indicates how many injuries are suffered when standardised across 100 employee working 40 hours per week for one year. Result: 2 * 1 000 000 / 175200 = 11. Helps. 2. 4% decrease on the 2019 result. MTI is Medical Treatment Injury (a work-related injury that requires treatment by a medical practitioner beyond first aid). The accident rate can be calculated for. Every industry comes with different risks and hazards so, even with an average incident rate, it’s hard to gauge what a “good. Definition. . The formula for calculating your accident frequency rate is the number of reported accidents multiplied by 200,000, divided by the number of employee hours worked. a year. Total recordable injuries rate (TRIR) The number of recordable injuries (including fatalities and LTIs) per million hours worked. Calculating Lost Time Injury Frequency Rate Measuring your LTIFR is actually easier than you think. It is calculated in the following manner: (Number of Reportable Injuries in the period / Total hours worked (by all employees) during the period) x 1,000,000. The first step in benchmarking is to calculate the incidence rates for your organization. Total number of. The calculation is based upon the number of lost time injures within a given period. The first step is to calculate for each year a fixed set of weights w. The most common rate used is the Recordable Incident Rate. Injury Severity Total Lost Work Days Cases * 200,000 /. 42 = 0. Take the number from Step 3 and divide it by the number from Step 2. Organizations can track the frequency.