UV Curing worked example

UV Cure Defect Rate (PPM) with cure-related defects this period of 30 defects: a worked example

This scenario runs the uv cure defect rate (ppm) calculation on the strong side: cure-related defects this period of 30 defects, with every other input held at its documented default. Use it for monthly quality reports, customer scorecards, and SPC reviews when the question is whether the UV cure step is on or off-target.

The inputs for this scenario

  • Cure-related defects this period: 30 defects (raised for this scenario; the documented default is 12)
  • Total cured parts this period: 48,000 parts (unchanged)
  • PPM target: 200 PPM (unchanged)

Working through the calculation

  • Applying the documented formula (PPM = defects ÷ total parts × 1,000,000) to the inputs above produces each figure below.
  • At this operating point the engine returns 0.06 PPM cure defects for cure defect ppm, the number this scenario is built around.
  • At this operating point the engine returns 200 points for gap to ppm target.
  • At this operating point the engine returns 30 defects for cure defects.
  • At this operating point the engine returns 48,000 parts for total cured parts.

How this compares with the baseline

  • Against the tool's baseline example, where cure-related defects this period sits at 12 defects and the headline result is 0.03 PPM cure defects, this scenario comes in 150% above the baseline at 0.06 PPM cure defects.
  • Use it at the end of each production period to trend cure quality and to verify a process change actually lowered cure-attributable failures. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Cure defect PPM: 0.06 PPM cure defects (headline result)
  • Gap to PPM target: 200 points
  • Cure defects: 30 defects
  • Total cured parts: 48,000 parts

Run it with your numbers

  • Every input above is editable in the live UV Cure Defect Rate (PPM) calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.