From CAD Model to First-Off Part: What Must Be Agreed

A CAD model defines geometry, but it does not automatically define a manufacturing plan. Before a supplier cuts material, both sides should agree which requirements control the part and how the first result will be judged.

Release one controlled package

The model, drawing, revision, material, finish and inspection requirements must refer to the same release. Informal screenshots are useful for discussion but poor production controls.

Separate function from convention

Explain which surfaces, fits and features drive performance. This helps the manufacturer choose datums, process sequence and inspection methods while still respecting the drawing.

Review manufacturability openly

Tool access, internal corners, wall thickness, stock form and clamping can affect cost and stability. A useful DFM review records proposed changes instead of silently changing the design.

Plan the first-off evidence

Agree which characteristics will be measured, the method, the report format and how deviations will be handled. The goal is not simply to receive one acceptable part, but to learn whether the intended process can repeat it.