MedTech Manufacturing worked example

Cleanroom Gowning Time at 11% re-gowning and transition allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop re-gowning and transition allowance to 11%, then walk the calculation through step by step. Estimate total gowning time burden per shift from cleanroom entries, gowning rate, and re-gowning allowance for transition delays.

The inputs for this scenario

  • Cleanroom entries per shift: 24 entries (held at the documented default)
  • Gowning throughput (entries per minute): 0.13 entries / min (held at the documented default)
  • Re-gowning and transition allowance: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base cleanroom gowning time = cleanroom entries per shift รท entries processed per minute.
  • Total gowning time per shift works out to 213 min at these inputs, and this is the headline figure for the scenario.
  • Base gowning time (no allowance) works out to 192 min at these inputs.
  • Re-gowning and transition time added works out to 11 % at these inputs.
  • Gowning throughput rate works out to 0.13 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where re-gowning and transition allowance sits at 15% and the headline result is 221 min, this scenario comes in 3.48% below the baseline at 213 min.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to re-gowning and transition allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats all entries as identical; a full ISO 5 bunny-suit gown takes far longer than a re-entry touch-up, so blend or segment entries if gowning levels differ widely.

Results at a glance

  • Total gowning time per shift: 213 min (headline result)
  • Base gowning time (no allowance): 192 min
  • Re-gowning and transition time added: 11 %
  • Gowning throughput rate: 0.13 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Cleanroom Gowning Time calculator, set re-gowning and transition allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.