Engineering Pareto Input
Enter issue categories, choose the analysis basis, then generate the sorted Pareto ranking and cumulative chart.
Example Data Table
| Issue Category | Occurrence Count | Downtime Hours | Cost Impact | Severity Rating |
|---|---|---|---|---|
| Bearing Wear | 42.00 | 18.50 | 12,600.00 | 9.00 |
| Sensor Drift | 31.00 | 9.00 | 5,200.00 | 6.00 |
| Seal Leakage | 27.00 | 13.50 | 8,900.00 | 8.00 |
| Alignment Error | 19.00 | 7.00 | 4,100.00 | 5.00 |
| Voltage Fluctuation | 16.00 | 11.00 | 7,300.00 | 7.00 |
| Cooling Blockage | 11.00 | 5.50 | 2,500.00 | 4.00 |
Formula Used
Chosen metric: The Pareto ranking uses one selected basis for every category.
Occurrence basis: Metrici = Occurrencei
Downtime basis: Metrici = Downtimei
Cost basis: Metrici = Costi
Weighted basis: Metrici = 100 × [wf(Fi/Fmax) + wd(Di/Dmax) + wc(Ci/Cmax) + ws(Si/Smax)] ÷ (wf + wd + wc + ws)
Share percentage: Sharei = Metrici ÷ ΣMetric × 100
Cumulative percentage: Cumulativei = (ΣMetric from rank 1 to i) ÷ ΣMetric × 100
How to Use This Calculator
- Enter each engineering issue category in separate rows.
- Provide occurrence count, downtime hours, cost impact, and severity rating.
- Select the analysis basis that matches your review objective.
- Set the cumulative threshold, such as 80%, for critical few identification.
- Adjust weights when you want a blended engineering impact score.
- Submit the form to sort categories and calculate cumulative percentages.
- Review the table, summary cards, and Pareto chart.
- Export the sorted results using the CSV or PDF buttons.
FAQs
1. What does this Pareto calculator show?
It sorts engineering issues from highest impact to lowest impact, then computes share and cumulative contribution. This helps you identify the small number of categories driving most losses, downtime, or cost.
2. When should I use the weighted score option?
Use weighted scoring when one metric alone is not enough. It is useful when frequency, downtime, cost, and severity all matter and you want one balanced impact score for ranking.
3. What threshold should I choose?
Eighty percent is the classic starting point, but different engineering teams may use 70%, 85%, or 90%. Choose the threshold that best fits how aggressively you want to define the critical few categories.
4. Does the calculator require currency formatting?
No. The cost field can represent any consistent cost unit, such as dollars, rupees, or internal maintenance points. Keep the same unit across all rows so comparisons remain valid.
5. How is severity used in the analysis?
Severity affects ranking only when weighted mode is selected. In that mode, severity is normalized against the maximum severity in the dataset and blended with the other weighted metrics.
6. Can I compare downtime and occurrence together?
Yes. Choose the weighted basis and assign weights to occurrence and downtime. This lets you combine frequent issues with long outages, instead of treating them as separate studies.
7. Why are categories sorted after submission?
Pareto analysis depends on descending order. Sorting ensures the table and chart show the biggest contributors first, which makes the cumulative line meaningful and highlights priority categories clearly.
8. What is the benefit of exporting the results?
Exports make it easier to share findings in maintenance reviews, root-cause meetings, and management updates. CSV supports further analysis, while PDF is useful for quick reporting and documentation.