Safety & Workforce worked example

Contractor Safety Score with incident severity rating of 20 score: a worked example

What does the result look like when incident severity rating reaches 20 score? The full calculation is worked below with real intermediate numbers. Use it when contractor safety in safety and workforce needs a defensible ranking against other safety and workforce risks for the next review.

The inputs for this scenario

  • Incident severity rating: 20 score (raised for this scenario; the documented default is 8)
  • Incident likelihood rating: 6 score (unchanged)
  • Hazard detectability rating: 7 score (unchanged)

Working through the calculation

  • Applying the documented formula (Weighted score = severity × 0.40 + occurrence × 0.35 + detection × 0.25) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.85 score for contractor safety risk score, the number this scenario is built around.
  • At this operating point the engine returns 20 score for contractor safety severity score.
  • At this operating point the engine returns 6 score for contractor safety occurrence score.
  • At this operating point the engine returns 7 score for contractor safety detection score.

How this compares with the baseline

  • Against the tool's baseline example, where incident severity rating sits at 8 score and the headline result is 7.05 score, this scenario comes in 68.09% above the baseline at 11.85 score.
  • A figure at this level is achievable when incident severity rating is genuinely sustained, not just peaked for a shift. The weightings and 1-10 ratings are judgment-based; two evaluators can score the same contractor differently, so calibrate your rating scale before comparing vendors.

Results at a glance

  • Contractor safety risk score: 11.85 score (headline result)
  • Contractor safety severity score: 20 score
  • Contractor safety occurrence score: 6 score
  • Contractor safety detection score: 7 score

Run it with your numbers

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

Last reviewed 2026-05-12.