Recordable Case Rate Calculator

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OSHA Recordable Case Rate Calculator

Total Recordable Incident Rate (TRIR)

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This represents the number of injuries per 100 full-time employees per year.

function calculateTRIR() { var injuries = document.getElementById('recordableInjuries').value; var hours = document.getElementById('totalHours').value; var resultArea = document.getElementById('resultArea'); var displayValue = document.getElementById('trirValue'); if (injuries === "" || hours === "" || hours <= 0) { alert("Please enter valid numbers. Total hours must be greater than zero."); return; } var injuriesNum = parseFloat(injuries); var hoursNum = parseFloat(hours); // OSHA Formula: (Number of Injuries x 200,000) / Total Hours Worked var trir = (injuriesNum * 200000) / hoursNum; displayValue.innerHTML = trir.toFixed(2); resultArea.style.display = 'block'; }

Understanding the Recordable Case Rate (TRIR)

The Total Recordable Incident Rate (TRIR) is a mathematical standard used by the Occupational Safety and Health Administration (OSHA) to monitor safety performance across different industries. It allows companies to compare their safety records against industry averages and historical performance, regardless of the size of their workforce.

How is the Recordable Case Rate Calculated?

The formula for TRIR is based on a standard of 100 full-time employees working 40 hours per week, 50 weeks per year, which totals 200,000 hours. By using this constant, the rate remains consistent whether you have 10 employees or 10,000.

TRIR = (Number of Recordable Cases × 200,000) / Total Hours Worked

What Counts as a "Recordable Case"?

According to OSHA, a recordable injury or illness includes:

  • Any work-related fatality.
  • Any work-related injury or illness that results in loss of consciousness, days away from work, restricted work, or transfer to another job.
  • Any work-related injury or illness requiring medical treatment beyond first aid.
  • Significant diagnosed injuries or illnesses, such as cancer or chronic irreversible diseases, even if they do not result in the above.

Practical Example

Imagine a manufacturing plant that had 4 recordable injuries over the last calendar year. During that same period, their total workforce logged 160,000 hours of labor.

Using the formula:

(4 injuries × 200,000) / 160,000 = 5.00

The plant's TRIR would be 5.0, meaning for every 100 employees, 5 suffered a recordable injury or illness during the year.

Why This Metric Matters

Companies track this rate for several critical reasons:

  1. OSHA Inspections: High TRIR scores can trigger targeted OSHA inspections.
  2. Insurance Premiums: Workers' compensation providers often look at TRIR when determining premiums.
  3. Bidding for Contracts: In industries like construction and oil/gas, a high TRIR can disqualify a company from bidding on major projects.
  4. Safety Culture: It serves as a lagging indicator to help management identify if safety protocols are failing.
Note: While TRIR is a vital metric, it is a "lagging" indicator—meaning it looks at what has already happened. For a comprehensive safety program, companies should also track "leading" indicators, such as safety training hours and near-miss reports.

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