Heat Exchanger, Coil & Radiator Manufacturing worked example

Refrigerant Charge Estimate with charge error impact severity of 15 score: a worked example

This scenario runs the refrigerant charge estimate calculation on the strong side: charge error impact severity of 15 score, with every other input held at its documented default. Use it when uncertain internal volume, circuiting, manifold changes, or charge sensitivity could affect HVAC coil or refrigeration equipment launch risk.

The inputs for this scenario

  • Charge error impact severity: 15 score (raised for this scenario; the documented default is 6)
  • Charge error occurrence likelihood: 4 score (unchanged)
  • Charge error detection difficulty: 3 score (unchanged)

Working through the calculation

  • Applying the documented formula (Refrigerant charge estimate risk score = charge impact severity × 0.40 + charge error occurrence × 0.35 + charge error detection risk × 0.25) to the inputs above produces each figure below.
  • At this operating point the engine returns 8.15 score for charge estimate risk score, the number this scenario is built around.
  • At this operating point the engine returns 15 score for charge impact severity.
  • At this operating point the engine returns 4 score for charge error occurrence.
  • At this operating point the engine returns 3 score for detection risk.

How this compares with the baseline

  • Against the tool's baseline example, where charge error impact 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.
  • Use it when prioritizing charge-related failure modes in a process FMEA, comparing the risk of competing charging methods, or deciding where to add verification on a charging line. 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

  • Charge estimate risk score: 8.15 score (headline result)
  • Charge impact severity: 15 score
  • Charge error occurrence: 4 score
  • Detection risk: 3 score

Run it with your numbers

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

Last reviewed 2026-05-12.