Composites, Fiberglass & Advanced Materials worked example

Vacuum Leak Risk with leak severity rating of 3.5 score: a worked example

This worked example runs the vacuum leak risk numbers for a tougher week than the baseline: leak severity rating of 3.5 score instead of the typical 7 score. Estimate vacuum leak risk for bagged composite layups, infusion tools, or cure bags.

The inputs for this scenario

  • Leak severity rating: 3.5 score (the input this scenario stresses; the baseline uses 7)
  • Leak occurrence likelihood rating: 5 score (held at the documented default)
  • Leak detection difficulty rating: 4 score (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Vacuum Leak Risk = vacuum leak severity score × vacuum leak occurrence score × vacuum leak detection difficulty score.
  • Vacuum leak risk score works out to 4.15 score at these inputs, and this is the headline figure for the scenario.
  • vacuum leak severity score works out to 3.5 score at these inputs.
  • vacuum leak occurrence score works out to 5 score at these inputs.
  • vacuum leak detection difficulty score works out to 4 score at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where leak severity rating sits at 7 score and the headline result is 5.55 score, this scenario comes in 25.23% below the baseline at 4.15 score.
  • Use it during process FMEA reviews, after a vacuum-related scrap event, or when prioritizing which tools and bagging details to re-engineer 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

  • Vacuum leak risk score: 4.15 score (headline result)
  • vacuum leak severity score: 3.5 score
  • vacuum leak occurrence score: 5 score
  • vacuum leak detection difficulty score: 4 score

Run it with your numbers

  • To rerun this with your own numbers, open the live Vacuum Leak Risk calculator, set leak severity rating to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.