Safety & Workforce worked example

Machine Guarding Risk with injury severity rating of 20 score: a worked example

This scenario runs the machine guarding risk calculation on the strong side: injury severity rating of 20 score, with every other input held at its documented default. Use it when machine guarding risk in safety and workforce needs a defensible ranking against other safety and workforce risks for the next review.

The inputs for this scenario

  • Injury severity rating: 20 score (raised for this scenario; the documented default is 8)
  • Exposure occurrence 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 machine guarding risk score, the number this scenario is built around.
  • At this operating point the engine returns 20 score for machine guarding risk severity score.
  • At this operating point the engine returns 6 score for machine guarding risk occurrence score.
  • At this operating point the engine returns 7 score for machine guarding risk detection score.

How this compares with the baseline

  • Against the tool's baseline example, where injury 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.
  • Use it during a machine-guarding audit or ISO 12100-style risk assessment to rank multiple hazards on one machine, or to compare guarding priorities across a line of equipment. 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

  • Machine guarding risk score: 11.85 score (headline result)
  • Machine guarding risk severity score: 20 score
  • Machine guarding risk occurrence score: 6 score
  • Machine guarding risk detection score: 7 score

Run it with your numbers

  • Every input above is editable in the live Machine Guarding Risk calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.