Gypsum, Drywall & Interior Panel Manufacturing worked example
Scrap Board Rate at 68% first-pass yield target: a worked example
This worked example runs the scrap board rate numbers for a tougher week than the baseline: 68% first-pass yield target instead of the typical 95%. Calculate scrap board rate for a shift or run and compare it to a first-pass yield target to quantify the gap.
The inputs for this scenario
- Scrap boards: 8 boards (held at the documented default)
- Total boards produced: 250 boards (held at the documented default)
- First-pass yield target: 68 % (the input this scenario stresses; the baseline uses 95)
Working through the calculation
- The calculation starts from the formula this tool documents: Scrap board rate = scrap boards / total boards produced.
- Rate works out to 3.2 % at these inputs, and this is the headline figure for the scenario.
- Gap to target works out to 64.8 points at these inputs.
- Affected count works out to 8 count at these inputs.
- Total count works out to 250 count at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where first-pass yield target sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
- Use it for shift and daily quality reporting, root-cause reviews, and tracking yield against a target. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.
Results at a glance
- Rate: 3.2 % (headline result)
- Gap to target: 64.8 points
- Affected count: 8 count
- Total count: 250 count
Run it with your numbers
- To rerun this with your own numbers, open the live Scrap Board Rate calculator, set first-pass yield target to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.