01
Send STEP, STL, or both
Keep STEP as the solid CAD source and STL as the print mesh when both exist, then explain what the plastic prototype proved.
Output
Model + process preference + functional context
// HOW_IT_WORKS
From 3D file to an approved metal process.
The human step sits where file fidelity, geometry, process, price, and risk meet. That is more useful than pretending every mesh or solid can be priced the same way.
02
Review the manufacturing route
A person checks file quality, geometry, interfaces, precision needs, support/tool access, and likely post-processing before pricing.
Output
Process route + questions + DFM notes
03
Resolve file-fidelity risk
STEP can remain the source for either route. STL-to-CNC reconstruction may change geometry, so the converted model must be reviewed and approved.
Output
Approved source or reconstructed manufacturing model
04
Approve the production scope
Process, material, quantity, finish, timing, inspection, post-processing, and documentation are confirmed before work begins.
Output
A quote based on explicit requirements