How do you calculate coil yield by profile?

Divide the affected panel count by the total panels formed for that profile and multiply by 100. With 8 rejects out of 250 panels, the rate is 8 / 250 x 100 = 3.2%.

Is the 3.2% here a scrap rate or a yield rate?

As entered it is the affected-panel rate — 3.2% of panels were flagged. A 3.2% reject rate implies a 96.8% good yield, which you would compare against your 95% target.

What does the gap to target mean?

It is the entered rate minus the target: 3.2 - 95 = -91.8 in raw points. Read alongside the intended metric — if you are tracking reject rate against a 5% scrap tolerance rather than a 95% yield goal, set the target field to match.

Why calculate yield by profile instead of one plant number?

Different profiles fail for different reasons — oil-canning on flat pans, coating cracks on tight bends, miscuts on long runs. A blended plant yield hides the one profile dragging the average, which per-profile tracking exposes.

What is a good coil yield for a metal roofing profile?

Mature profiles hold 97-99% good yield (1-3% reject). A profile scrapping above 3-4% deserves a root-cause look at tooling, coil condition or operator setup.

How many good panels does 3.2% scrap cost me?

On 250 formed panels, 8 are rejected — that is 8 panels of coil, coating and forming time lost, plus any coil you must re-run to fill the order.

Roofing, Siding & Exterior Building Products calculator

Coil yield by profile Calculator

Coil Yield by Profile measures what fraction of formed panels for a specific roofing or siding profile fail inspection, so you can see which profiles are burning coil. Quality leads and line supervisors at metal building-products plants track it per profile because a snap-lock standing seam and a corrugated wall panel scrap for completely different reasons — and blending them hides the offender. Coil is the single biggest cost in these products, so a profile scrapping even a few points above target quietly erodes margin. This calculator turns a raw reject count into a rate and shows how far each profile sits from your yield goal.

What this calculator does

Estimate coil yield by profile for roofing, siding and exterior building products using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.
Use it when coil yield by profile in roofing, siding and exterior building products needs a clean rate and gap-to-target you can put on a tier board.
It converts rejected panels for one profile into a percentage of total panels formed and compares that rate against your target yield goal.

Formula used

Coil yield by profile rate = coil yield by profile count ÷ total coil yield by profile population × 100
Coil yield by profile gap to target = coil yield by profile rate - target coil yield by profile rate

Inputs explained

Panels rejected for this profile:
Total panels formed for this profile:
Target coil yield rate:

How to use the result

Use it per profile after a run or shift to rank which profiles scrap most and to feed a yield improvement backlog.
It treats every rejected panel equally — a scratched wall panel and a scrapped long standing-seam sheet count the same, though their coil cost differs sharply.

Current U.S. benchmarks

U.S. housing starts run at 1,177k per year (Census, May 2026), down 8.7% from a year earlier, the demand driver for building products.

Common questions

How do you calculate coil yield by profile? Divide the affected panel count by the total panels formed for that profile and multiply by 100. With 8 rejects out of 250 panels, the rate is 8 / 250 x 100 = 3.2%.
Is the 3.2% here a scrap rate or a yield rate? As entered it is the affected-panel rate — 3.2% of panels were flagged. A 3.2% reject rate implies a 96.8% good yield, which you would compare against your 95% target.
What does the gap to target mean? It is the entered rate minus the target: 3.2 - 95 = -91.8 in raw points. Read alongside the intended metric — if you are tracking reject rate against a 5% scrap tolerance rather than a 95% yield goal, set the target field to match.
Why calculate yield by profile instead of one plant number? Different profiles fail for different reasons — oil-canning on flat pans, coating cracks on tight bends, miscuts on long runs. A blended plant yield hides the one profile dragging the average, which per-profile tracking exposes.
What is a good coil yield for a metal roofing profile? Mature profiles hold 97-99% good yield (1-3% reject). A profile scrapping above 3-4% deserves a root-cause look at tooling, coil condition or operator setup.

Last reviewed 2026-05-12.