Stone, Countertops & Engineered Surfaces worked example

Breakage Reserve at 3.45% slab breakage rate: a worked example

This scenario runs the breakage reserve calculation on the strong side: 3.45% slab breakage rate, with every other input held at its documented default. A fabrication-shop owner setting aside a reserve against slab breakage on a large project.

The inputs for this scenario

  • Slabs handled: 200 slabs (unchanged)
  • Replacement cost per slab: 850 $/slab (unchanged)
  • Slab breakage rate: 3.45 % (raised for this scenario; the documented default is 3)
  • Claims handling cost: 500 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Breakage reserve $ = slabs handled x replacement cost x breakage rate% + claims handling) to the inputs above produces each figure below.
  • At this operating point the engine returns 6,365 $ for total breakage reserve cost, the number this scenario is built around.
  • At this operating point the engine returns 31.83 $ / piece for breakage reserve cost per unit.
  • At this operating point the engine returns 5,865 $ for variable breakage reserve cost.
  • At this operating point the engine returns 500 $ for fixed breakage reserve adder.

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 13.66% above the baseline at 6,365 $.
  • Use it when pricing in a breakage allowance, setting an annual reserve budget, or evaluating whether a fragile material like quartzite justifies a surcharge. 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

  • Total breakage reserve cost: 6,365 $ (headline result)
  • Breakage reserve cost per unit: 31.83 $ / piece
  • Variable breakage reserve cost: 5,865 $
  • Fixed breakage reserve adder: 500 $

Run it with your numbers

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

Last reviewed 2026-05-12.