Single-Use Bioprocess Assemblies worked example

Bag Film Yield at 68% target bag film yield rate: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target bag film yield rate to 68%, then walk the calculation through step by step. Estimate bag film yield for single-use bioprocess assemblies using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.

The inputs for this scenario

  • Bag film assemblies passing inspection: 8 count (held at the documented default)
  • Bag film assemblies inspected in the lot: 250 count (held at the documented default)
  • Target bag film yield rate: 68 % (the input this scenario stresses; the baseline uses 95)

Working through the calculation

  • The calculation starts from the formula this tool documents: Bag film yield rate = bag film yield count ÷ total bag film yield population × 100.
  • Bag film yield rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
  • Bag film yield gap to target works out to 64.8 points at these inputs.
  • Bag film yield count works out to 8 count at these inputs.
  • Total bag film yield population works out to 250 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target bag film yield rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target bag film yield rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It only reflects the units you actually inspected; if sampling is not representative or defects escape inspection, the reported yield overstates true film quality.

Results at a glance

  • Bag film yield rate: 3.2 % (headline result)
  • Bag film yield gap to target: 64.8 points
  • Bag film yield count: 8 count
  • Total bag film yield population: 250 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Bag Film Yield calculator, set target bag film yield rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.