Cell Therapy & Gene Therapy Equipment worked example

Process Hold Time at 14% transfer, setup, and documentation allowance: a worked example

Suppose transfer, setup, and documentation allowance falls to 14%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate adjusted hold or queue time for cell therapy and gene therapy batches based on workload, processing rate, and delay allowance.

The inputs for this scenario

  • Queued batches, samples, or containers: 24 items (held at the documented default)
  • Clearing rate for the next GMP step: 0.8 items / min (held at the documented default)
  • Transfer, setup, and documentation allowance: 14 % (the input this scenario stresses; the baseline uses 20)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base queue clearing time = queued items รท clearing rate for the next GMP step.
  • Adjusted process hold time works out to 34.2 min at these inputs, and this is the headline figure for the scenario.
  • Base queue clearing time works out to 30 min at these inputs.
  • Hold-time allowance applied works out to 14 % at these inputs.
  • GMP step clearing rate works out to 0.8 items / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where transfer, setup, and documentation allowance sits at 20% and the headline result is 36 min, this scenario comes in 5% below the baseline at 34.2 min.
  • It computes base queue-clearing time as queued items divided by the step clearing rate, then inflates it by a transfer, setup, and documentation allowance. 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

  • Adjusted process hold time: 34.2 min (headline result)
  • Base queue clearing time: 30 min
  • Hold-time allowance applied: 14 %
  • GMP step clearing rate: 0.8 items / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Process Hold Time calculator, set transfer, setup, and documentation allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.