Specialty Films, Membranes & Barrier Materials worked example

Web Break Cost at 54% avoidable-break share: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop avoidable-break share to 54%, then walk the calculation through step by step. Estimate the cost of film web breaks on a coating or casting line including downtime, rethread and start-up scrap.

The inputs for this scenario

  • Web breaks per campaign: 8 breaks (held at the documented default)
  • Cost per break event: 1,200 $/break (held at the documented default)
  • Avoidable-break share: 54 % (the input this scenario stresses; the baseline uses 75)
  • Line restart and cleanup charge: 900 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total web-break cost = breaks x cost per break x avoidable share + restart charge.
  • Total web break cost works out to 6,084 $ at these inputs, and this is the headline figure for the scenario.
  • Web break cost per unit works out to 761 $ / piece at these inputs.
  • Variable web break cost works out to 5,184 $ at these inputs.
  • Fixed web break cost adder works out to 900 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where avoidable-break share sits at 75% and the headline result is 8,100 $, this scenario comes in 24.89% below the baseline at 6,084 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to avoidable-break share, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It applies a single average cost per break and one avoidable share, so it smooths over the fact that a break at high line speed on expensive coated web costs far more than one on unprimed film.

Results at a glance

  • Total web break cost: 6,084 $ (headline result)
  • Web break cost per unit: 761 $ / piece
  • Variable web break cost: 5,184 $
  • Fixed web break cost adder: 900 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Web Break Cost calculator, set avoidable-break share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.