Gypsum, Drywall & Interior Panel Manufacturing calculator
Defect Cost Calculator
Estimate defect cost by entering defective boards, rework or scrap cost per board, quality cost capture rate, and fixed quality overhead. The result builds a total quality cost including captured variable losses and fixed overhead for the run.
What this calculator does
- Estimate total defect cost for a board production run by combining defective board count, rework or scrap cost per board, quality cost capture rate, and fixed quality overhead.
- Use it at a quality cost review to quantify the cost of non-conforming boards and build a business case for a defect reduction investment.
- The result estimates total defect cost in dollars for a board production run at the entered defective board count, cost per board, capture rate, and fixed overhead.
Formula used
- Variable defect cost = defective boards x rework or scrap cost per board x quality cost capture rate
- Total defect cost = variable defect cost + fixed quality overhead
Inputs explained
- Defective boards: undefined
- Rework or scrap cost per board: undefined
- Quality cost capture rate: undefined
- Fixed quality overhead: undefined
How to use the result
- Use it at a quality cost review, root-cause investigation, or when building a business case to justify a defect reduction project.
- It remains an estimate when rework versus scrap classification changes, quality cost capture completeness varies, or fixed quality overhead allocation differs between runs.
Common questions
- What counts as a defect cost in drywall manufacturing? Defect costs include the direct material and labor cost of boards that must be reworked or scrapped, plus the overhead cost of quality inspection, sorting, and disposal. Hidden costs such as expediting and customer returns are not always captured in standard quality accounting.
- What data should I enter? Use defective board count from the inspection report, rework or scrap cost per board from the quality cost log, capture rate from your quality accounting completeness assessment, and fixed quality overhead from the cost allocation sheet.
- When is the result only an estimate? It remains an estimate when rework versus scrap classification varies, quality cost capture is incomplete, or fixed overhead allocation differs between production runs.
- What decision can this support? Use the result to prioritize defect reduction projects by annualizing the cost and comparing it to the investment required, then confirm with quality engineering and finance before committing resources.
Last reviewed 2026-05-12.