Industrial Sensors & Instrumentation worked example

Instrument Accuracy Score with accuracy severity rating of 3 1-10: a worked example

Suppose accuracy severity rating falls to 3 1-10. This page works the full calculation at that level so you can see exactly which result moves and by how much. Score the risk of instrument inaccuracy using severity, occurrence, and detection ratings so teams can prioritize accuracy improvements, tighter specs, or measurement system upgrades.

The inputs for this scenario

  • Accuracy severity rating: 3 1-10 (the input this scenario stresses; the baseline uses 6)
  • Accuracy occurrence rating: 3 1-10 (held at the documented default)
  • Accuracy detection rating: 4 1-10 (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Accuracy risk score = severity rating x occurrence rating x detection rating.
  • Accuracy risk priority score works out to 3.25 score at these inputs, and this is the headline figure for the scenario.
  • Accuracy severity rating works out to 3 score at these inputs.
  • Accuracy occurrence rating works out to 3 score at these inputs.
  • Accuracy detection rating works out to 4 score at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where accuracy severity rating sits at 6 1-10 and the headline result is 4.45 score, this scenario comes in 26.97% below the baseline at 3.25 score.
  • It multiplies accuracy severity, occurrence, and detection ratings into a single priority score that flags instruments needing tighter tolerances or upgrades. 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

  • Accuracy risk priority score: 3.25 score (headline result)
  • Accuracy severity rating: 3 score
  • Accuracy occurrence rating: 3 score
  • Accuracy detection rating: 4 score

Run it with your numbers

  • To rerun this with your own numbers, open the live Instrument Accuracy Score calculator, set accuracy severity rating to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.