Construction Products, Windows, Doors & Fenestration worked example

Glass Cut Yield at 68% target glass cut yield: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop target glass cut yield to 68%, then walk the calculation through step by step. Calculate glass cutting yield for lites, sheets, or IGU glass production.

The inputs for this scenario

  • Good glass lites or usable cut area: 1,830 lites (held at the documented default)
  • Total glass lites or issued cut area: 1,980 lites (held at the documented default)
  • Target glass cut yield: 68 % (the input this scenario stresses; the baseline uses 94)

Working through the calculation

  • The calculation starts from the formula this tool documents: Glass cut yield = good glass lites or usable cut area ÷ total glass lites or issued cut area × 100.
  • glass cut yield works out to 92.42 % at these inputs, and this is the headline figure for the scenario.
  • glass cut yield gap to target works out to -24.42 points at these inputs.
  • good glass lites or usable cut area works out to 1,830 count at these inputs.
  • total glass lites or issued cut area works out to 1,980 count at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target glass cut yield sits at 94% and the headline result is 92.42 %, this scenario lands almost exactly on the baseline at 92.42 %.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to target glass cut yield, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. Yield alone does not tell you the cost of each loss — a 4% scrap rate on jumbo low-E lites hurts far more than 4% on small clear annealed cuts, so pair it with a cost-weighted scrap figure.

Results at a glance

  • glass cut yield: 92.42 % (headline result)
  • glass cut yield gap to target: -24.42 points
  • good glass lites or usable cut area: 1,830 count
  • total glass lites or issued cut area: 1,980 count

Run it with your numbers

  • To rerun this with your own numbers, open the live Glass Cut Yield calculator, set target glass cut yield to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.