Abrasive Blasting, Shot Peening & Surface Prep worked example

Surface Contamination Risk Score with contamination severity of 23 score: a worked example

This scenario runs the surface contamination risk score calculation on the strong side: contamination severity of 23 score, with every other input held at its documented default. a quality inspector needs a practical contamination risk screen before coating, bonding, or peening acceptance

The inputs for this scenario

  • Contamination severity: 23 score (raised for this scenario; the documented default is 9)
  • Contamination likelihood: 4 score (unchanged)
  • Detection difficulty: 5 score (unchanged)

Working through the calculation

  • Applying the documented formula (Contamination risk score = severity × 0.40 + likelihood × 0.35 + detection difficulty × 0.25) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.85 contamination risk score for contamination risk score, the number this scenario is built around.
  • At this operating point the engine returns 23 score for contamination severity.
  • At this operating point the engine returns 4 score for contamination likelihood.
  • At this operating point the engine returns 5 score for detection difficulty.

How this compares with the baseline

  • Against the tool's baseline example, where contamination severity sits at 9 score and the headline result is 6.25 contamination risk score, this scenario comes in 89.6% above the baseline at 11.85 contamination risk score.
  • Use it during process FMEA or job planning to flag which blast and peen jobs need enhanced cleaning, passivation, or verification. 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

  • Contamination risk score: 11.85 contamination risk score (headline result)
  • Contamination severity: 23 score
  • Contamination likelihood: 4 score
  • Detection difficulty: 5 score

Run it with your numbers

  • Every input above is editable in the live Surface Contamination Risk Score calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.