Makers & production
How many good parts will we have after two inspection stages?
Apply the first pass rate to all starts. Apply the second rate only to the parts that passed stage one. Expected counts can be fractional and assume failed parts leave the run without rework.
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Worked example
With the example inputs below, the calculator returns these results.
Expected parts reaching stage two 920
- Parts entering the first stage
- 1,000 parts
- Stage one pass rate
- 92 %
- Pass rate among stage two entrants
- 95 %
Other results
- Expected good finished parts
- 874
- Expected parts lost
- 126
- Combined pass rate
- 87.4%
Use your own figures
Estimate the combined yield and expected losses for a proposed run. Open the worksheet, replace the example values, then copy or print the result.
Two-stage production yield →