Yield Loss: Definition, Formula, and Industry Benchmarks
The percentage of input material or units that does not become saleable output. Yield loss encompasses scrap, rework consumption, sampling, and process startup waste — it is broader than scrap rate be…
Aluminum casting operations typically see 12–18% yield loss due to sprue, runner, and gate material that must be remelted. Injection molding achieves 3–6% yield loss when runner systems are optimized. Food processing yield loss of 10–15% is typical for fresh produce; highly automated facilities achieve 5–8%.
How to Calculate Yield Loss
Formula
Yield Loss (%) = 100% − Yield (%)
Step-by-Step Example
100kg of raw material input yields 88kg of good product: Yield = 88%, Yield Loss = 12%
Yield Loss Benchmarks by Industry
2%
World class
5%
Good
10%
Acceptable
Needs work
Below 10%
| Industry | Typical Yield Loss |
|---|---|
| Metal Fabrication | 9% |
| Packaging | 4% |
Source: Pareto Base data compilation from industry benchmarking reports, 2026.
What Yield Loss Means for Your Team
For Quality Managers
Yield loss captures material waste that scrap rate misses — startup waste, sampling, and trim. For material-intensive operations, it's the more complete picture of process efficiency. Pareto Base tracks it when operators log scrap by weight or material consumed.
For CI & Lean Teams
Yield loss is the metric that resonates with purchasing and materials managers. Turning a yield loss reduction into a materials savings number is a fast way to justify a CI project. Pareto Base weight-based logging makes that calculation straightforward.
For Plant Managers
For operations where material cost is a significant portion of COGS — casting, food processing, metal stamping — yield loss is often a bigger dollar figure than you'd expect. Pareto Base makes it visible in real time.
For Production Teams
When you log scrap by weight rather than unit count, you're tracking yield loss. That extra detail helps your team understand whether the problem is in the process or the material.
The spreadsheet problem with Yield Loss
Yield loss calculations require comparing material inputs (from purchasing or ERP) against good output (from production tracking) — two different systems. Most SMB manufacturers don't bridge this gap without a dedicated tool.
How to Track Yield Loss with Pareto Base
Pareto Base supports weight-based scrap logging alongside unit-based logging. For processes like casting, food processing, or metal fabrication where material yield is the key metric, operators can log scrap in kg or lbs. Reports aggregate yield loss by product, reason, and time period.
Pareto Base features used:
- ✓Scrap Log Entry
- ✓Reports & Trends
- ✓Pareto Analysis (Basic+)
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