Overall Equipment Effectiveness (OEE) Analysis App

OEE Calculator OEE CALCULATOR Overall Equipment Effectiveness Analysis Tool Input Parameters Number of Shifts Hours per Shift Planned Shutdown (hours) Downtime Loss (minutes) Ideal Cycle Time Seconds Minutes Total Production (units) Good Production (units) Calculation Results ⚠️ Warning: Some values exceed 120% which may indicate input errors or exceptional performance. Factor Value Unit Total Available Time 24.0 hours Scheduled Operating Time 19.5 hours Operating Time 17.5 hours Ideal Cycle Time 0.008 hours Net Operating Time 15.8 hours Speed Loss 1.7 hours Production Reject 22 units Availability 72.9 % Performance 90.5 % Quality 98.8 % OEE 65.2 % Availability 72.9% Performance 90.5% Quality 98.8% Overall OEE 65.2% © 2025 Quality Gurus Inc. // Get all input elements const inputs { numShifts: document.getElementById('numShifts'), hoursPerShift: document.getElementById('hoursPerShift'), plannedShutdown: document.getElementById('plannedShutdown'), downtimeLoss: document.getElementById('downtimeLoss'), cycleTime: document.getElementById('cycleTime'), cycleTimeUnit: document.getElementById('cycleTimeUnit'), totalProduction: document.getElementById('totalProduction'), goodProduction: document.getElementById('goodProduction') }; // Get all result elements const results { totalAvailableTime: document.getElementById('totalAvailableTime'), scheduledOperatingTime: document.getElementById('scheduledOperatingTime'), operatingTime: document.getElementById('operatingTime'), idealCycleTimeDisplay: document.getElementById('idealCycleTimeDisplay'), netOperatingTime: document.getElementById('netOperatingTime'), speedLoss: document.getElementById('speedLoss'), productionReject: document.getElementById('productionReject'), availability: document.getElementById('availability'), performance: document.getElementById('performance'), quality: document.getElementById('quality'), oee: document.getElementById('oee') }; // Get chart elements const charts { availabilityCircle: document.getElementById('availabilityCircle'), performanceCircle: document.getElementById('performanceCircle'), qualityCircle: document.getElementById('qualityCircle'), oeeCircle: document.getElementById('oeeCircle'), availabilityValue: document.getElementById('availabilityValue'), performanceValue: document.getElementById('performanceValue'), qualityValue: document.getElementById('qualityValue'), oeeValue: document.getElementById('oeeValue') }; function updateCircleChart(circle, percentage) { const circumference 377; // 2 * π * 60 let displayPercentage Math.min(percentage, 100); // Cap at 100% for visual display const offset circumference - (displayPercentage / 100) * circumference; circle.style.strokeDashoffset offset; } function formatPercentageDisplay(percentage) { if (percentage > 100) { return ">100%"; } return percentage.toFixed(1) + "%"; } function checkForWarnings(availability, performance, quality, oee) { const warningMessage document.getElementById('warningMessage'); const warningText document.getElementById('warningText'); const highValues ; if (availability > 120) highValues.push('Availability'); if (performance > 120) highValues.push('Performance'); if (quality > 120) highValues.push('Quality'); if (oee > 120) highValues.push('OEE'); if (highValues.length > 0) { warningText.textContent `Warning: ${highValues.join(', ')} exceed${highValues.length 1 ? 's' : ''} 120% which may indicate input errors or exceptional performance.`; warningMessage.classList.add('show'); } else { warningMessage.classList.remove('show'); } } function calculateOEE() { // Get input values const numShifts parseFloat(inputs.numShifts.value) || 0; const hoursPerShift parseFloat(inputs.hoursPerShift.value) || 0; const plannedShutdown parseFloat(inputs.plannedShutdown.value) || 0; const downtimeLossMinutes parseFloat(inputs.downtimeLoss.value) || 0; const cycleTimeValue parseFloat(inputs.cycleTime.value) || 0; const cycleTimeUnit inputs.cycleTimeUnit.value; const totalProduction parseFloat(inputs.totalProduction.value) || 0; const goodProduction parseFloat(inputs.goodProduction.value) || 0; // Convert downtime loss to hours const downtimeLoss downtimeLossMinutes / 60; // Convert cycle time to hours let cycleTimeHours; if (cycleTimeUnit 'minutes') { cycleTimeHours cycleTimeValue / 60; } else { cycleTimeHours cycleTimeValue / 3600; } // Calculate time factors const totalAvailableTime numShifts * hoursPerShift; const scheduledOperatingTime totalAvailableTime - plannedShutdown; const operatingTime scheduledOperatingTime - downtimeLoss; // Calculate theoretical production time const theoreticalProductionTime totalProduction * cycleTimeHours; const netOperatingTime theoreticalProductionTime; const speedLoss operatingTime - netOperatingTime; // Calculate production reject const productionReject totalProduction - goodProduction; // Calculate OEE factors const availability scheduledOperatingTime > 0 ? (operatingTime / scheduledOperatingTime) * 100 : 0; const performance operatingTime > 0 ? (netOperatingTime / operatingTime) * 100 : 0; const quality totalProduction > 0 ? (goodProduction / totalProduction) * 100 : 0; const oee (availability * performance * quality) / 10000; // Update results results.totalAvailableTime.textContent totalAvailableTime.toFixed(1); results.scheduledOperatingTime.textContent scheduledOperatingTime.toFixed(1); results.operatingTime.textContent operatingTime.toFixed(1); results.idealCycleTimeDisplay.textContent cycleTimeHours.toFixed(6); results.netOperatingTime.textContent netOperatingTime.toFixed(1); results.speedLoss.textContent Math.max(0, speedLoss).toFixed(1); results.productionReject.textContent Math.max(0, productionReject).toFixed(0); results.availability.textContent availability.toFixed(1); results.performance.textContent performance.toFixed(1); results.quality.textContent quality.toFixed(1); results.oee.textContent oee.toFixed(1); // Update charts updateCircleChart(charts.availabilityCircle, availability); updateCircleChart(charts.performanceCircle, performance); updateCircleChart(charts.qualityCircle, quality); updateCircleChart(charts.oeeCircle, oee); // Update chart values with proper formatting for >100% charts.availabilityValue.textContent formatPercentageDisplay(availability); charts.performanceValue.textContent formatPercentageDisplay(performance); charts.qualityValue.textContent formatPercentageDisplay(quality); charts.oeeValue.textContent formatPercentageDisplay(oee); // Add styling for values over 100% charts.availabilityValue.className availability > 100 ? 'chart-value over-100' : 'chart-value'; charts.performanceValue.className performance > 100 ? 'chart-value over-100' : 'chart-value'; charts.qualityValue.className quality > 100 ? 'chart-value over-100' : 'chart-value'; charts.oeeValue.className oee > 100 ? 'chart-value over-100' : 'chart-value'; // Check for warnings checkForWarnings(availability, performance, quality, oee); } // Add event listeners to all inputs Object.values(inputs).forEach(input > { input.addEventListener('input', calculateOEE); input.addEventListener('change', calculateOEE); }); // Initial calculation calculateOEE(); // Validate good production doesn't exceed total production inputs.goodProduction.addEventListener('input', function() { const totalProd parseFloat(inputs.totalProduction.value) || 0; const goodProd parseFloat(this.value) || 0; if (goodProd > totalProd) { this.value totalProd; calculateOEE(); } }); inputs.totalProduction.addEventListener('input', function() { const totalProd parseFloat(this.value) || 0; const goodProd parseFloat(inputs.goodProduction.value) || 0; if (goodProd > totalProd) { inputs.goodProduction.value totalProd; calculateOEE(); } });

Overall Equipment Effectiveness (OEE) Analysis App

OEE CALCULATOR

Input Parameters

Calculation Results

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Factor	Value	Unit
Total Available Time	24.0	hours
Scheduled Operating Time	19.5	hours
Operating Time	17.5	hours
Ideal Cycle Time	0.008	hours
Net Operating Time	15.8	hours
Speed Loss	1.7	hours
Production Reject	22	units
Availability	72.9	%
Performance	90.5	%
Quality	98.8	%
OEE	65.2	%