Desalination & Membrane Water Treatment Equipment worked example

Membrane Supplier Risk Score with membrane supply failure severity of 3 score: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop membrane supply failure severity to 3 score, then walk the calculation through step by step. Score supplier risk for membranes, pressure vessels, pumps, instruments, chemicals, and cartridges using severity, occurrence, and detection ratings before quoting or purchasing.

The inputs for this scenario

  • Membrane supply failure severity (1-10): 3 score (the input this scenario stresses; the baseline uses 6)
  • Likelihood of supplier non-conformance (1-10): 4 score (held at the documented default)
  • Inability to detect a defect before install (1-10): 3 score (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Membrane equipment supplier risk score = supplier impact severity score × supplier issue occurrence score × supplier detection control score.
  • Membrane equipment supplier risk score works out to 3.35 score at these inputs, and this is the headline figure for the scenario.
  • Supplier impact severity score works out to 3 score at these inputs.
  • Supplier issue occurrence score works out to 4 score at these inputs.
  • Supplier detection control score works out to 3 score at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where membrane supply failure severity sits at 6 score and the headline result is 4.55 score, this scenario comes in 26.37% below the baseline at 3.35 score.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to membrane supply failure severity, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. The number is ordinal, not financial — a score of 120 is not literally twice the dollar exposure of 60, and identical scores can hide very different severity profiles, so always inspect the severity factor behind a high number.

Results at a glance

  • Membrane equipment supplier risk score: 3.35 score (headline result)
  • Supplier impact severity score: 3 score
  • Supplier issue occurrence score: 4 score
  • Supplier detection control score: 3 score

Run it with your numbers

  • To rerun this with your own numbers, open the live Membrane Supplier Risk Score calculator, set membrane supply failure severity to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.