What is the Incident Rate?
The Incident Rate is a measure used to assess the frequency of work-related injuries and illnesses. A lower incident rate generally indicates a safer work environment.
Formula:
The standard formula for calculating the Total Recordable Incident Rate (TRIR) is:
TRIR = (Number of Recordable Incidents × 200,000) / Total Employee Hours Worked
The 200,000 in the formula represents the equivalent of 100 employees working 40 hours per week for 50 weeks a year (100 employees × 40 hours/week × 50 weeks/year = 200,000 hours). This allows for a standardized comparison across different company sizes.
How to Interpret the Results:
An incident rate of X means that for every 100 full-time employees, there were X recordable incidents during the specified period.
Example Calculation:
Let's say a company had:
- 15 recordable incidents
- 200,000 total employee hours worked
Using the formula:
TRIR = (15 × 200,000) / 200,000 = 15.0
This means the company's incident rate is 15.0. This number can then be compared to industry averages and the company's historical rates.
var calculateIncidentRate = function() {
var totalCases = parseFloat(document.getElementById("totalCases").value);
var employeeHours = parseFloat(document.getElementById("employeeHours").value);
var workDays = parseFloat(document.getElementById("workDays").value);
var hoursPerDay = parseFloat(document.getElementById("hoursPerDay").value);
var resultDisplay = document.getElementById("result");
resultDisplay.innerHTML = ""; // Clear previous results
if (isNaN(totalCases) || isNaN(employeeHours) || isNaN(workDays) || isNaN(hoursPerDay)) {
resultDisplay.innerHTML = "Please enter valid numbers for all fields.";
return;
}
if (employeeHours <= 0) {
resultDisplay.innerHTML = "Total employee hours worked must be greater than zero.";
return;
}
// Standard TRIR calculation
var incidentRate = (totalCases * 200000) / employeeHours;
resultDisplay.innerHTML = "Your Total Recordable Incident Rate (TRIR) is:
" + incidentRate.toFixed(2) + "";
};
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