Single-Use Bioprocess Assemblies worked example

Rework Cost at 61% first-pass rework yield: a worked example in single-use bioprocess assemblies

Here is what the math looks like when conditions slip. We hold every other input steady and drop first-pass rework yield to 61%, then walk the calculation through step by step. Estimate rework cost for single-use bioprocess assemblies from reworked unit count, labor and replaced components, and re-inspection setup.

The inputs for this scenario

  • Assemblies Reworked: 30 assemblies (held at the documented default)
  • Rework Labor & Components: 145 $/assembly (held at the documented default)
  • First-Pass Rework Yield: 61 % (the input this scenario stresses; the baseline uses 85)
  • Re-Inspection Setup Cost: 650 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total rework cost = reworked assemblies x rework labor & components x first-pass yield + re-inspection setup.
  • Total rework cost works out to 3,304 $ at these inputs, and this is the headline figure for the scenario.
  • Rework cost per unit works out to 110 $ / piece at these inputs.
  • Variable rework cost works out to 2,654 $ at these inputs.
  • Fixed rework cost adder works out to 650 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where first-pass rework yield sits at 85% and the headline result is 4,348 $, this scenario comes in 24.01% below the baseline at 3,304 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to first-pass rework yield, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. The model treats first-pass rework yield as a simple cost multiplier; it does not recursively cost the fraction that fails rework a second time, so on low-yield rework loops the true cost runs higher than shown.

Results at a glance

  • Total rework cost: 3,304 $ (headline result)
  • Rework cost per unit: 110 $ / piece
  • Variable rework cost: 2,654 $
  • Fixed rework cost adder: 650 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Rework Cost calculator, set first-pass rework yield to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.