NPI, DFM/DFA & Engineering Change worked example

Manufacturability Score with manufacturability defect severity rating of 15 score: a worked example

What does the result look like when manufacturability defect severity rating reaches 15 score? The full calculation is worked below with real intermediate numbers. Use it when manufacturability in npi, dfm/dfa and engineering change needs a defensible ranking against other npi, dfm/dfa and engineering change risks for the next review.

The inputs for this scenario

  • Manufacturability defect severity rating: 15 score (raised for this scenario; the documented default is 6)
  • Manufacturability defect occurrence likelihood: 4 score (unchanged)
  • Manufacturability defect detection difficulty: 3 score (unchanged)

Working through the calculation

  • Applying the documented formula (Manufacturability risk score = manufacturability severity score × manufacturability occurrence score × manufacturability detection score) to the inputs above produces each figure below.
  • At this operating point the engine returns 8.15 score for manufacturability risk score, the number this scenario is built around.
  • At this operating point the engine returns 15 score for manufacturability severity score.
  • At this operating point the engine returns 4 score for manufacturability occurrence score.
  • At this operating point the engine returns 3 score for manufacturability detection score.

How this compares with the baseline

  • Against the tool's baseline example, where manufacturability defect severity rating sits at 6 score and the headline result is 4.55 score, this scenario comes in 79.12% above the baseline at 8.15 score.
  • A figure at this level is achievable when manufacturability defect severity rating is genuinely sustained, not just peaked for a shift. Multiplicative RPNs hide their inputs; a 6x4x3 and a 9x2x4 land near the same value despite very different real-world urgency, so always inspect the component scores.

Results at a glance

  • Manufacturability risk score: 8.15 score (headline result)
  • Manufacturability severity score: 15 score
  • Manufacturability occurrence score: 4 score
  • Manufacturability detection score: 3 score

Run it with your numbers

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

Last reviewed 2026-05-12.