Pharmaceutical, Biotech & GMP Manufacturing worked example

Assay Turnaround Cost at 58% assay scope included: a worked example

Suppose assay scope included falls to 58%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate cost tied to assay turnaround from test count, cost per assay, applicable sample scope, and fixed lab support cost.

The inputs for this scenario

  • QC assays or samples: 100 tests (held at the documented default)
  • Cost per assay or sample: 45 $ / test (held at the documented default)
  • Assay scope included: 58 % (the input this scenario stresses; the baseline uses 80)
  • Fixed lab support cost: 250 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable Assay turnaround cost = QC assays or samples × Cost per assay or sample × Assay scope included.
  • Total assay turnaround cost works out to 2,860 $ at these inputs, and this is the headline figure for the scenario.
  • Assay cost per test works out to 28.6 $ / piece at these inputs.
  • Variable assay cost works out to 2,610 $ at these inputs.
  • Fixed lab support cost works out to 250 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where assay scope included sits at 80% and the headline result is 3,850 $, this scenario comes in 25.71% below the baseline at 2,860 $.
  • It computes total assay cost as the number of assays times cost per assay times the assay scope fraction, plus a fixed lab support cost. 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

  • Total assay turnaround cost: 2,860 $ (headline result)
  • Assay cost per test: 28.6 $ / piece
  • Variable assay cost: 2,610 $
  • Fixed lab support cost: 250 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Assay Turnaround Cost calculator, set assay scope included to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.