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Conformal coating can improve moisture, dust, and corrosion resistance in PCB assembly, but only when the coating type, thickness, masking rules, and cure checks are defined clearly. This guide explains when buyers should require coating, what it protects, and where potting or design changes are the better choice.

Continuity-only testing is not enough for many wire harness and cable assembly programs. This guide explains what continuity, insulation resistance, and hipot testing each prove, what buyers should specify in the RFQ, and what records a supplier should retain before release.

Burn-in testing can be a useful screen for early-life failures in PCB assembly and box build work, but only when the load, temperature, duration, and records are clearly defined. This guide explains when buyers should ask for burn-in, what it can actually prove, and when other test methods are more effective.

First article inspection is where PCB assembly buyers either lock process discipline early or approve volume production with blind spots that become expensive later. This guide explains what a useful first article inspection should include, what evidence buyers should review, and how to avoid treating FAI as a cosmetic formality.

X-ray inspection is one of the most useful controls for hidden solder joints in PCB assembly, but many buyers request it too vaguely or expect it to prove more than it can. This guide explains when X-ray matters, what defects it can reveal, and what release evidence buyers should verify before approving production.

IPC/WHMA-A-620 is one of the most cited cable-assembly workmanship standards, but buyers still approve suppliers with vague claims and weak evidence. This guide explains what the standard covers, what it does not cover, and what records OEM teams should verify before release.