Define the project
Prototype requirements should distinguish functional evaluation from production qualification. State which features are representative of the final product and which are temporary. A faster or cheaper laminate substitution can change electrical or thermal behavior, so approve substitutions deliberately.
Requirements to include
- Released fabrication files and revision
- Quantity needed for each test or assembly stage
- Layer stackup, material and surface finish
- Mechanical constraints and critical dimensions
- Impedance, electrical test and inspection requirements
Decisions to resolve before release
Before the next revision, record the test results, assembly feedback and manufacturing questions. Carry approved changes into both the CAD data and the fabrication drawing. Sending a revised copper file with an older drawing creates ambiguity that is easy to avoid.
Request a project-specific quote
Send the design revision, quantity and required date with the technical requirements above. Identify anything still under review. Feasibility, process details, inspection scope and delivery are confirmed against the actual files; a general service description is not a production approval.
Related services and resources
What a prototype should prove
Define the questions before ordering: enclosure fit, connector access, circuit function, thermal behaviour or assembly feasibility. Order enough boards for the planned assembly and tests, including any samples needed for analysis.
A prototype built with a substitute material or simplified construction may answer only some of those questions. Record the differences from the intended production design and the validation still required. Before the next order, carry approved changes into every affected document so the fabrication data, drawing and BOM describe the same revision.
Prepare a prototype that answers the right questions
A breadboard or perfboard can help evaluate a simple circuit concept; a milled or printed prototype may answer selected geometry or connectivity questions. A fabricated PCB is needed when the validation depends on the intended stackup, plated interconnects, finish or assembly process. Record what each prototype construction can and cannot establish.
Choose the quantity from the planned assembly, fit checks, functional tests and any destructive analysis. There is no universal number of prototype iterations or boards. Reserve enough samples to investigate a failure without losing every known-good reference.
Reduce avoidable quotation and build delays
Send a complete revision-specific package and identify open questions at the start. Confirm material, components, assembly scope and test requirements. Widely available parts and an agreed construction can simplify planning, but substitutions still require approval.
Compare prototype quotes on the same scope, including setup, assembly, inspection, test and delivery. Requested quick-turn dates are reviewed against the actual files and material availability; this page does not promise a generic turnaround.
Close the loop before production
Inspect incoming boards and record assembly and functional results against the tested revision. Preserve failed samples and evidence when investigation is needed. Carry approved changes into every affected CAD file, drawing, BOM and test instruction.
A production transfer should identify remaining differences in materials, tooling, panelization and process. Use a pilot or first-article gate where appropriate, then archive the accepted configuration for repeat orders.