NPI, DFM/DFA & Engineering Change worked example

Tooling Readiness Score with tooling failure severity rating of 15 score: a worked example

This scenario runs the tooling readiness score calculation on the strong side: tooling failure severity rating of 15 score, with every other input held at its documented default. Use it when tooling readiness 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

  • Tooling failure severity rating: 15 score (raised for this scenario; the documented default is 6)
  • Tooling failure occurrence rating: 4 score (unchanged)
  • Tooling failure detection rating: 3 score (unchanged)

Working through the calculation

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

How this compares with the baseline

  • Against the tool's baseline example, where tooling failure 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.
  • Use it during APQP tooling reviews or pre-launch readiness gates to rank competing tooling risks and target mitigation effort. 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

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

Run it with your numbers

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

Last reviewed 2026-05-12.