Industrial Fans, Blowers & Air Movement Equipment worked example

Warranty Risk with field impact severity if the fan fails in service of 4 score: a worked example in industrial fans, blowers & air movement equipment

This worked example runs the warranty risk numbers for a tougher week than the baseline: field impact severity if the fan fails in service of 4 score instead of the typical 8 score. Score warranty risk for fan and blower products from field impact, expected occurrence, and weakness of current controls.

The inputs for this scenario

  • Field impact severity if the fan fails in service: 4 score (the input this scenario stresses; the baseline uses 8)
  • Likelihood this warranty failure mode occurs: 4 score (held at the documented default)
  • Inability to detect the defect before shipment: 3 score (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Warranty risk score = field impact score × 0.40 + expected warranty occurrence score × 0.35 + warranty detection weakness score × 0.25.
  • Warranty risk score works out to 3.75 score at these inputs, and this is the headline figure for the scenario.
  • Field impact score works out to 4 score at these inputs.
  • Expected warranty occurrence score works out to 4 score at these inputs.
  • Warranty detection weakness score works out to 3 score at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where field impact severity if the fan fails in service sits at 8 score and the headline result is 5.35 score, this scenario comes in 29.91% below the baseline at 3.75 score.
  • Use it during FMEA reviews, design sign-off, or supplier qualification for a fan or blower model to prioritize which warranty failure modes to mitigate first. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Warranty risk score: 3.75 score (headline result)
  • Field impact score: 4 score
  • Expected warranty occurrence score: 4 score
  • Warranty detection weakness score: 3 score

Run it with your numbers

  • To rerun this with your own numbers, open the live Warranty Risk calculator, set field impact severity if the fan fails in service to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.