Precast Concrete & Modular Construction Manufacturing worked example

Precast Defect Repair Cost at 61% defects repairable in-plant: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop defects repairable in-plant to 61%, then walk the calculation through step by step. Estimates precast defect repair cost from the count of panels flagged for patching, the finishing labor each, the share repairable in-plant, and a flat crew staging charge.

The inputs for this scenario

  • Panels flagged for surface repair: 18 panels (held at the documented default)
  • Patch & finishing labor per panel: 65 $/panel (held at the documented default)
  • Defects repairable in-plant: 61 % (the input this scenario stresses; the baseline uses 85)
  • Mobilized repair crew setup: 120 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total repair cost = flagged panels x labor per panel x in-plant repair rate + crew setup.
  • Total precast defect repair cost works out to 834 $ at these inputs, and this is the headline figure for the scenario.
  • Precast defect repair cost per unit works out to 46.32 $ / piece at these inputs.
  • Variable precast defect repair cost works out to 714 $ at these inputs.
  • Fixed precast defect repair cost adder works out to 120 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where defects repairable in-plant sits at 85% and the headline result is 1,115 $, this scenario comes in 25.2% below the baseline at 834 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to defects repairable in-plant, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes flagged panels are repairable in-plant at the entered rate and does not price scrapped panels or field rework, so batches with structural rejects that must be recast are understated.

Results at a glance

  • Total precast defect repair cost: 834 $ (headline result)
  • Precast defect repair cost per unit: 46.32 $ / piece
  • Variable precast defect repair cost: 714 $
  • Fixed precast defect repair cost adder: 120 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Precast Defect Repair Cost calculator, set defects repairable in-plant to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.