Safety & Workforce worked example

Contractor Safety Score with incident severity rating of 4 score: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop incident severity rating to 4 score, then walk the calculation through step by step. Score contractor safety from TRIR, training, and audit factors.

The inputs for this scenario

  • Incident severity rating: 4 score (the input this scenario stresses; the baseline uses 8)
  • Incident likelihood rating: 6 score (held at the documented default)
  • Hazard detectability rating: 7 score (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Weighted score = severity × 0.40 + occurrence × 0.35 + detection × 0.25.
  • Contractor safety risk score works out to 5.45 score at these inputs, and this is the headline figure for the scenario.
  • Contractor safety severity score works out to 4 score at these inputs.
  • Contractor safety occurrence score works out to 6 score at these inputs.
  • Contractor safety detection score works out to 7 score at these inputs.

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 22.7% below the baseline at 5.45 score.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to incident severity rating, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. 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: 5.45 score (headline result)
  • Contractor safety severity score: 4 score
  • Contractor safety occurrence score: 6 score
  • Contractor safety detection score: 7 score

Run it with your numbers

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

Last reviewed 2026-05-12.