Gypsum, Drywall & Interior Panel Manufacturing worked example
Scrap Board Rate at 99% first-pass yield target: a worked example
Push first-pass yield target up to 99% and the picture changes. This example computes every intermediate figure at that operating point. Use it at a shift review to show the scrap rate against the first-pass yield target and assign a corrective action before the next run.
The inputs for this scenario
- Scrap boards: 8 boards (unchanged)
- Total boards produced: 250 boards (unchanged)
- First-pass yield target: 99 % (raised for this scenario; the documented default is 95)
Working through the calculation
- Applying the documented formula (Scrap board rate = scrap boards / total boards produced) to the inputs above produces each figure below.
- At this operating point the engine returns 3.2 % for rate, the number this scenario is built around.
- At this operating point the engine returns 95.8 points for gap to target.
- At this operating point the engine returns 8 count for affected count.
- At this operating point the engine returns 250 count for total count.
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 %.
- It computes scrap board rate as scrap boards divided by total boards produced, and the gap between your first-pass yield target and current yield. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.
Results at a glance
- Rate: 3.2 % (headline result)
- Gap to target: 95.8 points
- Affected count: 8 count
- Total count: 250 count
Run it with your numbers
- Every input above is editable in the live Scrap Board Rate calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.