Stone, Countertops & Engineered Surfaces worked example

Breakage Reserve at 2.16% slab breakage rate: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop slab breakage rate to 2.16%, then walk the calculation through step by step. Estimates a breakage reserve covering slabs lost to cracking or chipping during handling, transport, and installation.

The inputs for this scenario

  • Slabs handled: 200 slabs (held at the documented default)
  • Replacement cost per slab: 850 $/slab (held at the documented default)
  • Slab breakage rate: 2.16 % (the input this scenario stresses; the baseline uses 3)
  • Claims handling cost: 500 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Breakage reserve $ = slabs handled x replacement cost x breakage rate% + claims handling.
  • Total breakage reserve cost works out to 4,172 $ at these inputs, and this is the headline figure for the scenario.
  • Breakage reserve cost per unit works out to 20.86 $ / piece at these inputs.
  • Variable breakage reserve cost works out to 3,672 $ at these inputs.
  • Fixed breakage reserve adder works out to 500 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where slab breakage rate sits at 3% and the headline result is 5,600 $, this scenario comes in 25.5% below the baseline at 4,172 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to slab breakage rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It uses a flat average breakage rate; thin material, long overhangs, and large-format porcelain break far above the average and need their own rate.

Results at a glance

  • Total breakage reserve cost: 4,172 $ (headline result)
  • Breakage reserve cost per unit: 20.86 $ / piece
  • Variable breakage reserve cost: 3,672 $
  • Fixed breakage reserve adder: 500 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Breakage Reserve calculator, set slab breakage rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.