How do you calculate rework cost?

Multiply units needing rework by the rework cost per unit and the share of build affected for the variable cost, then add the fixed containment cost. With 100 units, $45 each, an 80% affected share, and $250 containment, the total is $3,850.

What is the difference between rework cost and scrap cost?

Rework cost is what you spend to bring a defective unit back to spec; scrap cost is the lost value when a unit cannot be saved. Compare the two per unit, here $38.50 of rework, to decide which is cheaper.

What counts as containment cost?

Fixed costs to stop the defect from escaping: extra inspection stations, sorting a quarantined batch, customer notifications, and the corrective-action investigation, captured here as the $250 fixed term.

Why include a share of build affected?

Often only part of a flagged batch actually carries the defect. The affected share scales the variable cost so you are not charging rework to units that pass, keeping the $3,600 variable figure realistic.

How does rework cost feed cost of quality?

It is a core internal-failure cost. Track it alongside scrap and warranty to compute your total cost of poor quality and to justify prevention spending on the line.

How can I reduce rework cost on DER builds?

Catch defects earlier, since per-unit rework rises the deeper a unit is in assembly. In-line test, poka-yoke fixtures, and supplier quality controls cut both the affected share and the per-unit hours.

Microgrid & Distributed Energy Equipment calculator

Rework Cost Calculator

Rework cost is the total dollars burned re-working defective microgrid and distributed energy equipment, from re-flashing controller firmware to re-torquing busbars or replacing a bad batch of capacitors in inverters. Quality, production, and finance leaders use it to size the cost of a nonconformance and to justify the corrective action that prevents the next one. Because DER assemblies are high-mix and labor-intensive, a single defect class caught at final test can consume hundreds of touch-hours and a flat containment cost on top. This calculator separates the volume-driven rework spend from the fixed cost of containing the problem.

What this calculator does

Estimate the rework cost on microgrid and distributed energy assemblies, so quality and operations teams can size the hit, compare scenarios, or decide whether it is material to the build budget or quote.
Use it when rework on microgrid and distributed energy assemblies needs a defensible cost for a quality review or quote.
It computes total rework dollars by combining a per-unit variable rework cost with a fixed containment cost.

Formula used

Variable rework cost = units needing rework × rework cost per unit × share of build affected
Total rework cost = variable rework cost + fixed containment cost

Inputs explained

Units needing rework:
Rework cost per unit:
Share of build affected:
Fixed containment cost:

How to use the result

Use it to quantify a nonconformance, build a cost-of-quality case, or compare scrap-versus-rework decisions on a defective batch.
It assumes a uniform per-unit rework cost; in practice rework hours vary by defect and by how deep into assembly the unit was when caught.

Current U.S. benchmarks

Industrial electricity averages 8.66 cents per kWh across the U.S. (EIA, Apr 2026), up 5.5% from a year earlier. Energy-intensive steps carry this directly into unit cost.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate rework cost? Multiply units needing rework by the rework cost per unit and the share of build affected for the variable cost, then add the fixed containment cost. With 100 units, $45 each, an 80% affected share, and $250 containment, the total is $3,850.
What is the difference between rework cost and scrap cost? Rework cost is what you spend to bring a defective unit back to spec; scrap cost is the lost value when a unit cannot be saved. Compare the two per unit, here $38.50 of rework, to decide which is cheaper.
What counts as containment cost? Fixed costs to stop the defect from escaping: extra inspection stations, sorting a quarantined batch, customer notifications, and the corrective-action investigation, captured here as the $250 fixed term.
Why include a share of build affected? Often only part of a flagged batch actually carries the defect. The affected share scales the variable cost so you are not charging rework to units that pass, keeping the $3,600 variable figure realistic.
How does rework cost feed cost of quality? It is a core internal-failure cost. Track it alongside scrap and warranty to compute your total cost of poor quality and to justify prevention spending on the line.

Last reviewed 2026-05-12.