Defects per million opportunities calculator

Calculate total opportunities and DPMO with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use total opportunities and DPMO to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Observed defect occurrences (defects)
12
Inspected units (units)
1000
Countable opportunities per unit (opportunities/unit)
4
Total opportunities
4000
DPMO
3000

Try another scenario

Observed defect occurrences (defects)
20
Inspected units (units)
1000
Countable opportunities per unit (opportunities/unit)
4
Total opportunities
4000
DPMO
5000
Calculation method

Calculation method

Total opportunities

units*opportunitiesPerUnit.

DPMO

1e6*defects/totalOpportunities.

Symbols and units
a
Observed defect occurrences (defects)
b
Inspected units (units)
c
Countable opportunities per unit (opportunities/unit)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Requires an explicit consistent opportunity definition; no sigma-level conversion, defect severity comparison or defective-unit inference. Supported limits: 0<=defects<=units*opportunities; positive integer denominators.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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