Ceramic, Tile & Sanitaryware Manufacturing worked example

Shrinkage Allowance Cost with fired pieces requiring shrinkage allowance of 6,000 pieces: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop fired pieces requiring shrinkage allowance to 6,000 pieces, then walk the calculation through step by step. Estimate material and handling cost tied to oversize green production needed to cover ceramic drying and firing shrinkage.

The inputs for this scenario

  • Fired pieces requiring shrinkage allowance: 6,000 pieces (the input this scenario stresses; the baseline uses 12,000)
  • Added green body cost per fired piece: 0.18 $ / piece (held at the documented default)
  • Fixed mold, die, or size-control cost: 650 $ (held at the documented default)
  • Added handling, inspection, and overhead cost: 420 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Added green body allowance cost = fired pieces requiring allowance × added green body cost per fired piece.
  • Total shrinkage allowance cost works out to 2,150 $ allowance cost at these inputs, and this is the headline figure for the scenario.
  • Shrinkage allowance cost per fired piece works out to 0.36 $ / piece at these inputs.
  • Added green body allowance cost works out to 1,080 $ at these inputs.
  • Fixed mold and handling adders works out to 1,070 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where fired pieces requiring shrinkage allowance sits at 12,000 pieces and the headline result is 3,230 $ allowance cost, this scenario comes in 33.44% below the baseline at 2,150 $ allowance cost.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to fired pieces requiring shrinkage allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats the per-piece green-body adder as a flat rate; if shrinkage varies by body lot or kiln zone, the true allowance cost will scatter around this average.

Results at a glance

  • Total shrinkage allowance cost: 2,150 $ allowance cost (headline result)
  • Shrinkage allowance cost per fired piece: 0.36 $ / piece
  • Added green body allowance cost: 1,080 $
  • Fixed mold and handling adders: 1,070 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Shrinkage Allowance Cost calculator, set fired pieces requiring shrinkage allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.