DPMO — Defects Per Million Opportunities

In plain English

Defects Per Million Opportunities measures how many defects occur per one million opportunities.

DPMO puts defect rates into perspective.

It normalizes quality across different volumes and processes.

What they actually mean

DPMO creates precision — sometimes false precision.

If “opportunities” are defined creatively, the number becomes meaningless.

Garbage definitions still produce clean math.

Example

Does it actually matter?

✅ Yes — when definitions are honest and consistent.