How do you calculate packaging scrap rate?

Divide rejected packages by total packages inspected and multiply by 100. With 8 rejects out of 250 inspected, the scrap rate is 3.2%.

What is a good packaging scrap rate for sterile wearable packaging?

Mature sterile-barrier lines target low single digits, often under 1-2% for stable film and validated sealers. At 3.2% you are above a tight target and worth investigating for seal or film variation.

What does the gap to target mean here?

It is the scrap rate minus your target field. Make sure both are on a scrap basis - if you enter a 95% pass target against a 3.2% scrap rate, the raw subtraction (91.8 points) mixes bases and is not a true scrap gap.

Why measure scrap on packages rather than seals?

A single package can have multiple seals but ships or scraps as one unit, so package-level scrap ties directly to devices that cannot ship. Seal-level defect data is useful for root cause but not for shipping impact.

What usually causes sterile packaging scrap on wearables?

Seal-strength drift from sealer temperature or dwell, contamination or wrinkles in the seal path, film lot variation, and lidding misregistration. A rising scrap rate against target is often the first sign a sealer needs attention.

How many packages should I inspect for a meaningful rate?

250 inspected gives a usable lot-level read, but 8 rejects is a small numerator - one more or fewer reject shifts the rate by 0.4 points, so trend several lots before reacting to a single number.

Wearable Medical Sensors calculator

Packaging Scrap Calculator

Packaging scrap rate measures the share of wearable-sensor sterile-barrier packages rejected out of all packages inspected, then compares it to your target. It matters because a rejected sterile package - a failed seal, a pouch breach, a misregistered lid - is a device that cannot ship until it is repacked, and on medical wearables that scrap carries a fully loaded device and a documented rework path. Quality and packaging engineers watch this rate to catch a drifting sealer or a bad film lot before it snowballs. Framing it against a target turns a raw count into an actionable gap.

What this calculator does

Estimate packaging scrap for wearable medical sensors using production-ready inputs so teams can track KPI performance and decide whether corrective action is needed.
Use it when packaging scrap in wearable medical sensors needs a clean rate and gap-to-target you can put on a tier board.
It computes the packaging scrap rate as rejected packages divided by total inspected, times 100, and the gap between that rate and your target.

Formula used

Packaging scrap rate = packaging scrap count ÷ total packaging scrap population × 100
Packaging scrap gap to target = packaging scrap rate - target packaging scrap rate

Inputs explained

Rejected sterile packages:
Total packages inspected:
Target packaging scrap rate:

How to use the result

Use it in a daily or per-lot quality review of the sterile-barrier packaging line to trend scrap and flag out-of-target lots.
The gap-to-target here is a simple subtraction of two percentages; if your target field is entered as a pass/yield target rather than a scrap target, the gap number will not read as points of scrap - keep both fields on the same basis.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
U.S. manufacturing runs at 75.6% of capacity with new factory orders at $657B per month (Federal Reserve and Census, May 2026).
The U.S. has 11,261 computer and electronic products establishments employing about 815,443 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate packaging scrap rate? Divide rejected packages by total packages inspected and multiply by 100. With 8 rejects out of 250 inspected, the scrap rate is 3.2%.
What is a good packaging scrap rate for sterile wearable packaging? Mature sterile-barrier lines target low single digits, often under 1-2% for stable film and validated sealers. At 3.2% you are above a tight target and worth investigating for seal or film variation.
What does the gap to target mean here? It is the scrap rate minus your target field. Make sure both are on a scrap basis - if you enter a 95% pass target against a 3.2% scrap rate, the raw subtraction (91.8 points) mixes bases and is not a true scrap gap.
Why measure scrap on packages rather than seals? A single package can have multiple seals but ships or scraps as one unit, so package-level scrap ties directly to devices that cannot ship. Seal-level defect data is useful for root cause but not for shipping impact.
What usually causes sterile packaging scrap on wearables? Seal-strength drift from sealer temperature or dwell, contamination or wrinkles in the seal path, film lot variation, and lidding misregistration. A rising scrap rate against target is often the first sign a sealer needs attention.

Last reviewed 2026-05-12.