Pharmaceutical, Biotech & GMP Manufacturing worked example

Contamination Risk Score with contamination severity score of 3 score: a worked example in pharmaceutical, biotech & gmp manufacturing

Suppose contamination severity score falls to 3 score. This page works the full calculation at that level so you can see exactly which result moves and by how much. Score contamination risk using severity, occurrence likelihood, and detection strength for cleanroom or sterile manufacturing decisions.

The inputs for this scenario

  • Contamination severity score: 3 score (the input this scenario stresses; the baseline uses 6)
  • Occurrence likelihood score: 4 score (held at the documented default)
  • Detection weakness score: 3 score (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Risk score = severity score × 0.40 + occurrence score × 0.35 + detection weakness score × 0.25.
  • Contamination risk score works out to 3.35 score at these inputs, and this is the headline figure for the scenario.
  • Severity score works out to 3 score at these inputs.
  • Occurrence score works out to 4 score at these inputs.
  • Detection weakness score works out to 3 score at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where contamination severity score 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.
  • It computes a single weighted contamination priority score by combining severity (40%), occurrence (35%), and detection weakness (25%). When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Contamination risk score: 3.35 score (headline result)
  • Severity score: 3 score
  • Occurrence score: 4 score
  • Detection weakness score: 3 score

Run it with your numbers

  • To rerun this with your own numbers, open the live Contamination Risk Score calculator, set contamination severity score to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.