Work out defect rate (dpmo) instantly with clear inputs, formula shown and shareable results.
DPMO normalises defect counts by complexity. Counting opportunities per unit — solder joints, dimensions, data fields — lets you compare a simple bracket with a complex assembly on the same scale, which is why Six Sigma programmes standardise on it.
Defects per opportunity
DPO = Defects / (Units x Opportunities per unit)
DPMO
DPMO = DPO x 1,000,000
Count the independent ways a unit can fail inspection, and then keep the definition fixed. Inflating opportunities is the easiest way to fake an improvement.
No. PPM counts defective units; DPMO counts defects against opportunities, so a unit with three defects contributes three.