Industrial Packaging Materials Manufacturing worked example

Film Extrusion Yield at 68% target yield rate: a worked example

This worked example runs the film extrusion yield numbers for a tougher week than the baseline: 68% target yield rate instead of the typical 95%. Calculate first-pass yield for blown or cast film extrusion lines by comparing good output footage against total extruded footage, then measure the gap to your target yield.

The inputs for this scenario

  • Good film footage produced: 18,500 linear ft (held at the documented default)
  • Total film footage extruded: 20,000 linear ft (held at the documented default)
  • Target 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: Film extrusion yield rate = good film footage produced / total film footage extruded x 100.
  • Film extrusion yield rate works out to 92.5 % at these inputs, and this is the headline figure for the scenario.
  • Gap to target yield works out to -24.5 points at these inputs.
  • Good film footage produced works out to 18,500 count at these inputs.
  • Total film footage extruded works out to 20,000 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target yield rate sits at 95% and the headline result is 92.5 %, this scenario lands almost exactly on the baseline at 92.5 %.
  • Use it at the end of each run or shift to grade a film line and decide whether scrap is within tolerance before releasing the roll set. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Film extrusion yield rate: 92.5 % (headline result)
  • Gap to target yield: -24.5 points
  • Good film footage produced: 18,500 count
  • Total film footage extruded: 20,000 count

Run it with your numbers

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

Last reviewed 2026-05-12.