Building Materials Manufacturing worked example

Glass Remelt Savings at 72% savings assigned to this furnace, line, or product: a worked example

Suppose savings assigned to this furnace, line, or product falls to 72%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate net savings from returning scrap glass or cullet to remelt instead of buying virgin batch or disposing waste.

The inputs for this scenario

  • Cullet or scrap glass returned to remelt: 1,200 tons (held at the documented default)
  • Avoided virgin batch or disposal cost per ton: 35 $ / ton (held at the documented default)
  • Savings assigned to this furnace, line, or product: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed sorting, crushing, or handling cost: 650 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Allocated glass remelt savings = cullet or scrap glass returned to remelt × avoided virgin batch or disposal cost per ton × allocation share.
  • Glass Remelt Savings works out to 30,890 $ remelt savings at these inputs, and this is the headline figure for the scenario.
  • Avoided virgin batch or disposal cost per ton works out to 25.74 $ / piece at these inputs.
  • Allocated glass remelt savings works out to 30,240 $ at these inputs.
  • Fixed sorting, crushing, or handling cost works out to 650 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where savings assigned to this furnace, line, or product sits at 100% and the headline result is 42,650 $ remelt savings, this scenario comes in 27.57% below the baseline at 30,890 $ remelt savings.
  • It computes net savings from remelting cullet by multiplying tons returned by the avoided cost per ton and an allocation share, then subtracting nothing but adding any fixed handling cost into the accounted total. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Glass Remelt Savings: 30,890 $ remelt savings (headline result)
  • Avoided virgin batch or disposal cost per ton: 25.74 $ / piece
  • Allocated glass remelt savings: 30,240 $
  • Fixed sorting, crushing, or handling cost: 650 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Glass Remelt Savings calculator, set savings assigned to this furnace, line, or product to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.