Define the project
Testing should start with a requirement and a measurable result. Bare-board connectivity, solder-joint inspection, component-level electrical checks and finished-product function are different questions. Specify the test coverage needed for your application instead of relying on a generic “tested” label.
Requirements to include
- Netlist and bare-board electrical-test requirements
- Assembly inspection and hidden-joint coverage
- Programming and firmware revision
- Functional interfaces, fixtures and test software
- Pass/fail limits, records and failure handling
Decisions to resolve before release
The board design must support the intended test. Test-point access, connector pinout, fixture clearances and power sequencing should be considered before layout release. Agree on fixture ownership, setup charges and how changes to the product will be reflected in the test program.
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.
Select methods by the defect or function being checked
Bare-board continuity and isolation testing checks the manufactured interconnect against its reference. Assembly optical inspection and X-ray examine different visible or hidden features. In-circuit, flying-probe, boundary-scan and functional approaches have different access, instrumentation and coverage requirements.
For each requirement, identify the method, test conditions, pass/fail limit and retained record. Not every product supports every test approach. Test pads, programming interfaces, fixtures and firmware should be considered before layout is complete so the agreed coverage is practical.
Separate production screening from qualification
Temperature cycling, humidity, vibration, burn-in and accelerated stress methods serve different purposes. Define the product state, profile, fixture, monitoring and acceptance basis before using them. A short stress exposure is not automatic proof of a particular service life or compliance status.
Agree first-article evidence, routine production checks and any sampled qualification work as separate scopes. For electrical isolation tests, use requirements appropriate to the actual product and construction. Keep test-program revisions, calibration requirements and nonconformance handling connected to the released build.