Conveyors worked example

Changeover Impact on Line Capacity with units not produced during changeover of 1,600 units: a worked example

This scenario runs the changeover impact on line capacity calculation on the strong side: units not produced during changeover of 1,600 units, with every other input held at its documented default. a production planner needs to quantify how changeover time reduces available line capacity

The inputs for this scenario

  • Units not produced during changeover: 1,600 units (raised for this scenario; the documented default is 620)
  • Contribution value per missed unit: 4.85 $ / unit (unchanged)
  • Changeover labor and setup cost: 950 $ (unchanged)
  • Startup scrap or expedite adders: 420 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Changeover impact cost = missed units × contribution value + labor/setup cost + startup adders) to the inputs above produces each figure below.
  • At this operating point the engine returns 9,130 $ / changeover for changeover capacity impact cost, the number this scenario is built around.
  • At this operating point the engine returns 5.71 $ / unit for cost per missed unit.
  • At this operating point the engine returns 7,760 $ for lost contribution during changeover.
  • At this operating point the engine returns 1,370 $ for setup and startup adders.

How this compares with the baseline

  • Against the tool's baseline example, where units not produced during changeover sits at 620 units and the headline result is 4,377 $ / changeover, this scenario comes in 109% above the baseline at 9,130 $ / changeover.
  • Use it to prioritize SMED and setup-reduction projects, to quote the real cost of short runs, and to decide minimum economic batch sizes on a busy line. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Changeover capacity impact cost: 9,130 $ / changeover (headline result)
  • Cost per missed unit: 5.71 $ / unit
  • Lost contribution during changeover: 7,760 $
  • Setup and startup adders: 1,370 $

Run it with your numbers

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

Last reviewed 2026-05-12.