NPI, DFM/DFA & Engineering Change worked example

Tooling Readiness Score with tooling failure severity rating of 3 score: a worked example

Suppose tooling failure severity rating falls to 3 score. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate tooling readiness for npi, dfm/dfa and engineering change using production-ready inputs so teams can rank risks and decide which issue needs containment, controls, or escalation first.

The inputs for this scenario

  • Tooling failure severity rating: 3 score (the input this scenario stresses; the baseline uses 6)
  • Tooling failure occurrence rating: 4 score (held at the documented default)
  • Tooling failure detection rating: 3 score (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Tooling readiness risk score = tooling readiness severity score × tooling readiness occurrence score × tooling readiness detection score.
  • Tooling readiness risk score works out to 3.35 score at these inputs, and this is the headline figure for the scenario.
  • Tooling readiness severity score works out to 3 score at these inputs.
  • Tooling readiness occurrence score works out to 4 score at these inputs.
  • Tooling readiness detection score works out to 3 score at these inputs.

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 26.37% below the baseline at 3.35 score.
  • It multiplies the severity, occurrence and detection ratings into a single risk priority score for a tooling readiness concern. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Tooling readiness risk score: 3.35 score (headline result)
  • Tooling readiness severity score: 3 score
  • Tooling readiness occurrence score: 4 score
  • Tooling readiness detection score: 3 score

Run it with your numbers

  • To rerun this with your own numbers, open the live Tooling Readiness Score calculator, set tooling failure severity rating to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.