Pump, Compressor & Rotating Equipment Assembly worked example

Bearing Life Estimate with failure severity if bearing fails of 15 score: a worked example

Push failure severity if bearing fails up to 15 score and the picture changes. This example computes every intermediate figure at that operating point. Use it when bearing life estimate in pump, compressor and rotating equipment assembly needs a defensible ranking against other pump, compressor and rotating equipment assembly risks for the next review.

The inputs for this scenario

  • Failure severity if bearing fails: 15 score (raised for this scenario; the documented default is 6)
  • Likelihood of early bearing wear: 4 score (unchanged)
  • Ability to detect bearing degradation: 3 score (unchanged)

Working through the calculation

  • Applying the documented formula (Bearing Life Estimate risk 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 8.15 score for risk score, the number this scenario is built around.
  • At this operating point the engine returns 15 score for severity.
  • At this operating point the engine returns 4 score for occurrence.
  • At this operating point the engine returns 3 score for detection.

How this compares with the baseline

  • Against the tool's baseline example, where failure severity if bearing fails sits at 6 score and the headline result is 4.55 score, this scenario comes in 79.12% above the baseline at 8.15 score.
  • It computes a weighted bearing risk score: severity times 0.40 plus occurrence times 0.35 plus detection times 0.25. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Risk score: 8.15 score (headline result)
  • Severity: 15 score
  • Occurrence: 4 score
  • Detection: 3 score

Run it with your numbers

  • Every input above is editable in the live Bearing Life Estimate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.