Construction Products, Windows, Doors & Fenestration worked example

Frame Scrap Rate at 2.88% target frame scrap rate: a worked example

Push target frame scrap rate up to 2.88% and the picture changes. This example computes every intermediate figure at that operating point. tracking frame and sash scrap before final assembly

The inputs for this scenario

  • scrapped frame or sash members: 86 members (unchanged)
  • total frame or sash members produced: 2,860 members (unchanged)
  • target frame scrap rate: 2.88 % (raised for this scenario; the documented default is 2.5)

Working through the calculation

  • Applying the documented formula (Frame scrap rate = scrapped frame or sash members ÷ total frame or sash members produced × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.01 % for frame scrap rate, the number this scenario is built around.
  • At this operating point the engine returns -0.13 points for frame scrap gap to target.
  • At this operating point the engine returns 86 count for scrapped frame or sash members.
  • At this operating point the engine returns 2,860 count for total frame or sash members produced.

How this compares with the baseline

  • Against the tool's baseline example, where target frame scrap rate sits at 2.5% and the headline result is 3.01 %, this scenario lands almost exactly on the baseline at 3.01 %.
  • It computes the frame scrap rate as scrapped members divided by total members produced times 100, and the gap between that rate and your target. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • frame scrap rate: 3.01 % (headline result)
  • frame scrap gap to target: -0.13 points
  • scrapped frame or sash members: 86 count
  • total frame or sash members produced: 2,860 count

Run it with your numbers

  • Every input above is editable in the live Frame Scrap Rate calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.