Cell Therapy & Gene Therapy Equipment worked example

Cell Therapy Rework Cost at 58% share of rework cost charged to this line and scope: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop share of rework cost charged to this line and scope to 58%, then walk the calculation through step by step. Estimate cost from repeat documentation, retesting, relabeling, reprocessing, or corrective work in GMP cell and gene therapy operations.

The inputs for this scenario

  • Expected rework events per period: 18 events (held at the documented default)
  • Average cost per rework event: 3,200 $ / event (held at the documented default)
  • Share of rework cost charged to this line/scope: 58 % (the input this scenario stresses; the baseline uses 80)
  • Fixed retraining, requalification, or corrective cost: 14,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Allocated repeat-work cost = expected rework events × average cost per event × assigned share.
  • Total cell therapy rework cost works out to 47,408 $ rework at these inputs, and this is the headline figure for the scenario.
  • Rework cost per event works out to 2,634 $ / event at these inputs.
  • Allocated repeat-work cost works out to 33,408 $ at these inputs.
  • Fixed corrective rework cost works out to 14,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share of rework cost charged to this line and scope sits at 80% and the headline result is 60,080 $ rework, this scenario comes in 21.09% below the baseline at 47,408 $ rework.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to share of rework cost charged to this line and scope, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It uses an average cost per event, so it will understate tail-risk lots (lost patient doses, comparability re-runs) where a single rework dwarfs the average.

Results at a glance

  • Total cell therapy rework cost: 47,408 $ rework (headline result)
  • Rework cost per event: 2,634 $ / event
  • Allocated repeat-work cost: 33,408 $
  • Fixed corrective rework cost: 14,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Cell Therapy Rework Cost calculator, set share of rework cost charged to this line and scope to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.