Your prototype works. Is it ready for production?

A working prototype is a useful achievement. It may also leave production questions unanswered. Perhaps a part was hand-fitted, a different material was used or an engineer adjusted the assembly to make it work.

The next step is to understand what the prototype has proved and what still needs checking under production conditions.

Record how the prototype was made

Keep the drawing revision, BOM, materials and build methods with the test results. Record any manual adjustments. If a part only fitted after a surface was filed by hand, that matters when planning how to manufacture it.

Ask:

• Did the tested assembly match the current drawings and BOM?
• Which materials, dimensions or processes differed from the proposed production version?
• Which operating conditions were not tested?

These answers help separate a successful demonstration from an assumption about production.

Resolve critical questions before tooling

A feature that is easy to change in CAD may be expensive to alter once a mold has been made. Review the geometry for the intended process: draft and wall thickness for molded parts, tool access for machining, and access and sequence for assembly.

Not every open question has to stop the project. Prioritize issues that affect function, safety, tooling or the next commitment. Agree which decisions can wait and what a later change would involve.

Give the pilot a clear purpose

Before making parts, agree what the trial must demonstrate. Define critical measurements, assembly checks, functional tests and how rejected parts will be handled.

Use materials, processes and assembly conditions that represent production wherever practical. Record any differences. The size of the trial should follow the question and the risk; there is no single batch size that proves readiness for every product.

Review the result before increasing volume

Completing a pilot doesn’t automatically mean the product is ready for repeat orders. Review the results, unresolved defects and approved documents first.

A useful handover includes:

• Approved drawings, BOM and reference samples.
• Inspection and test criteria for later production.
• Open actions, owners and any limits on release.
• Who can approve changes or accept deviations.

Sometimes the next step is a focused repeat trial rather than a redesign. What matters is knowing what still needs to be demonstrated.

Explore Prototype to Production for production preparation, or Prototyping & Validation for prototype builds and testing.