DPMO Calculator
Calculate Defects Per Million Opportunities — the standard Six Sigma measure of process quality. Free, instant and fully in your browser, using the same formula built into Yamazo Studio.
DPMO
5,000
defects per million opportunities
DPMO = (Defects / (Units × Opportunities)) × 1,000,000
What is DPMO?
Defects Per Million Opportunities (DPMO) normalises quality across processes of different size and complexity. Instead of a raw defect count, it expresses how many defects would occur per one million chances to make one. Because it accounts for the number of opportunities in each unit, DPMO lets you compare a simple part with a complex assembly on the same scale, and it is the basis for converting quality into a sigma level.
How to calculate DPMO
- 1
Count units and opportunities
Record how many units you inspected and how many distinct ways a defect could occur in each unit (opportunities per unit).
- 2
Count the defects
Add up the total number of defects found across all inspected units — not defective units, but defects.
- 3
Read DPMO
DPMO = defects divided by total opportunities (units × opportunities per unit), scaled to one million. Convert it to a sigma level to benchmark the process.
Frequently asked questions
What is the difference between a defect and a defective?
A defective is a unit that fails for any reason; a defect is a single nonconformity. One defective unit can carry several defects. DPMO counts defects against the total number of opportunities, which is why opportunities per unit matters.
How does DPMO relate to sigma level?
DPMO converts directly to a process sigma level using the normal distribution with the conventional 1.5σ shift. For example, 3.4 DPMO corresponds to a Six Sigma process. Use our Sigma Level calculator for the conversion.
How does Yamazo Studio help reduce defects?
Yamazo Studio turns shop-floor video into time studies, standard work and waste analysis, so you can see where defects and rework originate in the work itself and design them out.
Related lean & quality tools
Measure quality, then engineer it out
DPMO tells you where you stand. Yamazo Studio turns shop-floor video into the standard work and waste analysis that drive defects down — one offline Lean Operating Desk.
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