How do you calculate prototype scrap cost?

Multiply the number of scrapped parts by the value lost per part and by the unrecoverable share, then add disposal and handling cost. For 15 parts at $110 each, 85% unrecoverable, plus $250 disposal: 15 x 110 x 0.85 + 250 = $1,652.50 total.

What does the unrecoverable share mean?

It is the percent of a scrapped part's value you cannot get back through regrind, material recovery or rework. At 85%, you recover 15% of the part value; only $1,402.50 of the variable loss is truly gone before disposal cost.

What is the scrap cost per prototype here?

Total scrap cost of $1,652.50 divided by 15 scrapped parts equals $110.17 per prototype - slightly above the $110 value lost per part because the fixed $250 disposal cost is spread across the units.

Why separate variable and fixed scrap cost?

The variable cost ($1,402.50) scales with how many parts you scrap, while the fixed disposal adder ($250) is incurred per scrap event. Splitting them shows how per-unit cost falls as the lot size grows.

How can I reduce prototype scrap cost?

Front-load DFM reviews, run smaller first-article lots, and recover material where possible to raise the recoverable share. Cutting the unrecoverable share from 85% to 60% on this build would drop variable loss from $1,402.50 to roughly $990.

Is recovered material credited in this calculation?

Yes, indirectly. The unrecoverable share already nets out recovered value, so only the truly lost portion is counted before the fixed disposal cost is added.

NPI, DFM/DFA & Engineering Change calculator

Prototype Scrap Cost Calculator

Prototype Scrap Cost quantifies the money lost when prototype and validation-build parts are scrapped during new product introduction. NPI engineers, build coordinators and finance partners use it to budget development builds and to expose where DFM problems are burning cash before a product ever reaches production. Prototype parts often carry full tooling, soft-tool and rush-machining costs, so a handful of scrapped units can quietly consume a development budget - this calculator makes that loss visible per part and in total.

What this calculator does

Estimate the cost of scrapped prototypes from scrap count, value lost per piece, the unrecoverable share, and disposal cost.
an NPI team needs to quantify scrap exposure from iterative prototype builds during development.
It computes the total dollar loss from scrapped prototypes by multiplying quantity, value per part and the unrecoverable share, then adding fixed disposal cost, and divides by quantity for a per-unit figure.

Formula used

Total prototype scrap cost = scrapped prototypes × value lost per scrap × unrecoverable share + disposal and handling cost
Scrap cost per prototype = total prototype scrap cost ÷ scrapped prototypes

Inputs explained

Prototypes scrapped:
Value lost per scrapped prototype:
Unrecoverable share of value:
Disposal and handling cost:

How to use the result

Use it after a prototype or validation build to tally scrap loss, or beforehand to estimate the scrap budget for a planned build.
It assumes a single representative value per scrapped part; mixed lots with very different part values should be split and run separately for accuracy.

Common questions

How do you calculate prototype scrap cost? Multiply the number of scrapped parts by the value lost per part and by the unrecoverable share, then add disposal and handling cost. For 15 parts at $110 each, 85% unrecoverable, plus $250 disposal: 15 x 110 x 0.85 + 250 = $1,652.50 total.
What does the unrecoverable share mean? It is the percent of a scrapped part's value you cannot get back through regrind, material recovery or rework. At 85%, you recover 15% of the part value; only $1,402.50 of the variable loss is truly gone before disposal cost.
What is the scrap cost per prototype here? Total scrap cost of $1,652.50 divided by 15 scrapped parts equals $110.17 per prototype - slightly above the $110 value lost per part because the fixed $250 disposal cost is spread across the units.
Why separate variable and fixed scrap cost? The variable cost ($1,402.50) scales with how many parts you scrap, while the fixed disposal adder ($250) is incurred per scrap event. Splitting them shows how per-unit cost falls as the lot size grows.
How can I reduce prototype scrap cost? Front-load DFM reviews, run smaller first-article lots, and recover material where possible to raise the recoverable share. Cutting the unrecoverable share from 85% to 60% on this build would drop variable loss from $1,402.50 to roughly $990.

Last reviewed 2026-05-12.