NRE: design, fixtures and first build, and what you divide them by

In high-volume manufacturing, one-time costs get divided by a huge number and effectively vanish. At the volumes this trade runs at, the same costs divided by a small number do not vanish at all — they can exceed the material.

This is where machine builders lose money, and the error runs in one direction only: **the real cost is always higher than the quoted one.**

Which costs are non-recurring

One test settles it: **if you built a second unit, would you have to do this again?** No means non-recurring.

The hard question: divide by how many

By the units in this order, or by the units you hope to sell? Both are defensible and they give very different answers.

• This order only — conservative, higher unit price, and you can never fail to recover the cost. Right when the machine is specific to one customer.
• Expected future volume — lower unit price, more competitive, but you are betting on orders that do not exist yet. If the second order never comes, the unrecovered part is a real loss.

When it does not belong in the cost at all

If the customer pays for design and fixtures separately — common for custom machinery — then those are not part of the product cost, and including them charges twice.

But settle ownership: if the fixture belongs to the customer and can move to another supplier, you cannot amortize it over future work either. You have neither the cost nor the security, and the sheet should reflect that.

Why this decides profit and loss

In a low-volume trade the non-recurring share is large. Omit it and the sheet looks healthy, the quote looks competitive, and you win the work — at a price below the real cost.

This is the mechanism behind a shop that is busy, quotes everything as profitable, and still cannot explain where the year went. Each job is profitable on the costs that were counted.

What to do when NRE is large

When the sheet shows a large one-time share, the improvement direction is not faster cycles. It is **making the one-time work reusable**:

• Standardize sub-assemblies across machine models, so one design and one fixture serve several orders.
• Use adjustable fixtures instead of dedicated ones wherever tolerances allow.
• Separate the reusable part of the design from the customer-specific part, and charge only the specific part to the customer.

None of these is visible while the one-time cost is buried inside a unit cost. Pulling it out is the precondition for seeing them at all.