Conveyors worked example

Scrap Impact on Line Output at 1.73% maximum acceptable scrap rate: a worked example

Push maximum acceptable scrap rate up to 1.73% and the picture changes. This example computes every intermediate figure at that operating point. a quality or operations manager needs to quantify how much scrap is reducing finished output

The inputs for this scenario

  • Scrapped or rejected line units: 185 units (unchanged)
  • Total units produced by line: 9,400 units (unchanged)
  • Maximum acceptable scrap rate: 1.73 % (raised for this scenario; the documented default is 1.5)

Working through the calculation

  • Applying the documented formula (Line scrap rate = scrapped units ÷ total produced units × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 1.97 % scrap for line scrap rate, the number this scenario is built around.
  • At this operating point the engine returns -0.24 points for scrap-rate gap to target.
  • At this operating point the engine returns 185 units for scrapped or rejected units.
  • At this operating point the engine returns 9,400 units for total units produced.

How this compares with the baseline

  • Against the tool's baseline example, where maximum acceptable scrap rate sits at 1.5% and the headline result is 1.97 % scrap, this scenario lands almost exactly on the baseline at 1.97 % scrap.
  • It converts scrapped units and total produced units into a line scrap rate percentage, then compares that rate against your maximum acceptable scrap 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

  • Line scrap rate: 1.97 % scrap (headline result)
  • Scrap-rate gap to target: -0.24 points
  • Scrapped or rejected units: 185 units
  • Total units produced: 9,400 units

Run it with your numbers

  • Every input above is editable in the live Scrap Impact on Line Output calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.