Scrap Rate: Definition, Formula, and Industry Benchmarks
The percentage of produced units (or material) that cannot be sold or used as-is and must be discarded or recycled. The most fundamental manufacturing quality metric. Distinguishes between planned scr…
Scrap and rework costs the average manufacturer 2.2% of annual revenue. Top performers spend 0.6% of sales. The ASQ estimates quality-related costs (including scrap) consume 15–20% of annual sales for many manufacturers. A $100M company reducing scrap by 10% saves $220,000/year.
How to Calculate Scrap Rate
Formula
Scrap Rate (%) = (Number of Scrapped Units / Total Units Produced) × 100
Step-by-Step Example
If a line produces 1,000 parts per shift and 42 are scrapped: Scrap Rate = (42 / 1,000) × 100 = 4.2%
Scrap Rate Benchmarks by Industry
1%
World class
2%
Good
5%
Acceptable
Needs work
Below 5%
| Industry | Typical Scrap Rate |
|---|---|
| Automotive (Tier 2/3) | 4.2% |
| Metal Fabrication | 6.5% |
| Electronics Assembly | 4.8% |
| Food & Beverage | 7.2% |
| Plastics & Rubber | 5% |
| Industrial Equipment | 5.5% |
| Packaging | 4% |
Source: Pareto Base data compilation from industry benchmarking reports, 2026.
What Scrap Rate Means for Your Team
For Quality Managers
The headline metric for ISO 9001 and IATF 16949 reporting. Pareto Base makes it visible by product, reason, and shift — so you know exactly which defect types are driving your rate up before the auditors ask.
For CI & Lean Teams
The baseline metric for every scrap reduction campaign. Set your scrap rate target in Pareto Base when launching a campaign, then track progress in real time with before-and-after trend charts.
For Plant Managers
Tracks directly against revenue lost to waste. A 1% reduction in scrap rate on a $20M operation saves ~$44K/year in material alone, before labor and overhead. Pareto Base surfaces this on the dashboard without spreadsheet work.
For Production Teams
You see it every shift — parts that can't go forward. Logging them in Pareto Base takes seconds and gives your quality team the data they need to fix the root cause instead of just counting the waste.
The spreadsheet problem with Scrap Rate
Teams tracking scrap rate in spreadsheets typically update it weekly from paper tally sheets — meaning the data is 5-7 days old when decisions get made. By then, a bad batch has already shipped or been scrapped.
How to Track Scrap Rate with Pareto Base
Pareto Base calculates scrap rate automatically from logged entries, broken down by product, reason, disposition, machine, and shift. The dashboard shows your current rate vs. your campaign target, and the trend chart shows whether you're improving.
Pareto Base features used:
- ✓Scrap Log Entry
- ✓Real-Time Dashboard
- ✓Reports & Trends
- ✓Pareto Analysis (Basic+)
- ✓Campaign Management
Free plan available. Basic plan from $18/month.