How do you calculate rework cost per unit?

Multiply devices reworked by the per-unit labor and materials rate, scale by the reworkable yield, add fixed changeover and re-inspection, then divide by unit count. In the default case that is $3,570 total across 500 devices, or $7.14 per device.

When is rework cheaper than scrapping a device?

When the per-unit rework cost stays below the fully loaded cost to scrap and rebuild — including lost material, the new build's labor, and any expedite. At $7.14 per device here, rework beats scrap if a fresh unit costs more than that to produce and dispose of the reject.

What does reworkable yield mean?

It is the share of flagged devices that can actually be salvaged rather than scrapped outright. At 85% in the example, only that fraction of the rework labor and materials is spent productively, which is why the variable cost lands at $2,720 rather than the full gross.

Why include changeover and re-inspection as a separate cost?

Stopping a validated line to run rework and then re-inspecting the salvaged units is a fixed hit that does not scale with quantity. Here it is $850 and appears as the fixed adder, so small rework batches carry a much higher effective per-unit cost.

What is a good rework cost per unit for animal health devices?

Lower is better, but the meaningful benchmark is your own scrap cost and unit margin. Trend it per product line; a per-unit figure creeping up usually signals a process drifting out of control upstream rather than a rework problem.

Does this include the cost of the original defect?

No. This captures only the recovery cost. The full cost of the nonconformance also includes the wasted first-pass labor and materials and any scheduling disruption, which sit in other cost-of-quality categories.

Veterinary Device & Animal Health Products calculator

Rework Cost Calculator

Rework cost quantifies what it truly costs to salvage nonconforming veterinary devices — the labor and materials to fix them, adjusted for the fraction that are actually reworkable rather than scrapped, plus the fixed penalty of stopping the line and re-inspecting. Production supervisors, quality engineers, and cost accountants at animal health manufacturers use it to decide whether rework is cheaper than scrap-and-rebuild and to keep an eye on a cost that hides inside standard labor variance. It matters because rework on regulated animal health product often demands re-inspection and documentation that a simple parts-and-labor estimate ignores. Expressed per device, it becomes a number you can compare directly against unit scrap cost and against the margin you are protecting.

What this calculator does

Estimates the cost to rework defective veterinary devices and animal health products back into saleable condition.
A quality engineer uses it to size the rework exposure on a lot of injectable applicators that failed a dimensional check.
It computes total rework cost as devices reworked times the rework rate times the reworkable yield percentage, plus fixed changeover and re-inspection cost, then divides by units for a per-device figure.

Formula used

Total rework = devices reworked x rework rate x reworkable yield% + changeover/re-inspection
Per device = total rework / devices reworked

Inputs explained

Devices Reworked:
Rework Labor & Materials Rate:
Reworkable Yield:
Line Changeover & Re-Inspection:

How to use the result

Use it during scrap-versus-rework decisions, when quoting the recovery cost of a nonconformance, or when trending rework spend against production volume.
It assumes reworked devices pass the second time; units that fail re-inspection and need a second rework pass or end in scrap are not captured and will understate true cost.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity with new factory orders at $657B per month (Federal Reserve and Census, May 2026).

Common questions

How do you calculate rework cost per unit? Multiply devices reworked by the per-unit labor and materials rate, scale by the reworkable yield, add fixed changeover and re-inspection, then divide by unit count. In the default case that is $3,570 total across 500 devices, or $7.14 per device.
When is rework cheaper than scrapping a device? When the per-unit rework cost stays below the fully loaded cost to scrap and rebuild — including lost material, the new build's labor, and any expedite. At $7.14 per device here, rework beats scrap if a fresh unit costs more than that to produce and dispose of the reject.
What does reworkable yield mean? It is the share of flagged devices that can actually be salvaged rather than scrapped outright. At 85% in the example, only that fraction of the rework labor and materials is spent productively, which is why the variable cost lands at $2,720 rather than the full gross.
Why include changeover and re-inspection as a separate cost? Stopping a validated line to run rework and then re-inspecting the salvaged units is a fixed hit that does not scale with quantity. Here it is $850 and appears as the fixed adder, so small rework batches carry a much higher effective per-unit cost.
What is a good rework cost per unit for animal health devices? Lower is better, but the meaningful benchmark is your own scrap cost and unit margin. Trend it per product line; a per-unit figure creeping up usually signals a process drifting out of control upstream rather than a rework problem.

Last reviewed 2026-05-12.