Space Payload & Avionics Manufacturing worked example

Component Derating Risk with consequence-of-overstress severity of 15 score: a worked example

What does the result look like when consequence-of-overstress severity reaches 15 score? The full calculation is worked below with real intermediate numbers. Use it when component derating risk in space payload and avionics manufacturing needs a defensible ranking against other space payload and avionics manufacturing risks for the next review.

The inputs for this scenario

  • Consequence-of-Overstress Severity: 15 score (raised for this scenario; the documented default is 6)
  • Likelihood of Exceeding Derating Limit: 4 score (unchanged)
  • Detectability Before Flight: 3 score (unchanged)

Working through the calculation

  • Applying the documented formula (Component derating risk score = component derating risk severity score × component derating risk occurrence score × component derating risk detection score) to the inputs above produces each figure below.
  • At this operating point the engine returns 8.15 score for component derating risk score, the number this scenario is built around.
  • At this operating point the engine returns 15 score for component derating risk severity score.
  • At this operating point the engine returns 4 score for component derating risk occurrence score.
  • At this operating point the engine returns 3 score for component derating risk detection score.

How this compares with the baseline

  • Against the tool's baseline example, where consequence-of-overstress severity 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.
  • A figure at this level is achievable when consequence-of-overstress severity is genuinely sustained, not just peaked for a shift. RPN multiplication can mask a high-severity item behind a low occurrence or detection score, so always treat any high-severity part as an escalation regardless of the product.

Results at a glance

  • Component derating risk score: 8.15 score (headline result)
  • Component derating risk severity score: 15 score
  • Component derating risk occurrence score: 4 score
  • Component derating risk detection score: 3 score

Run it with your numbers

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

Last reviewed 2026-05-12.