Electronic Assembly Acceptability & Reliability Practice

IPC (public standard summaries); ANSI/ESD S20.20; ISO 2859-1 sampling · PCB assembly, cable harnesses, electronic manufacturing services

Electronics quality rests on three public pillars: workmanship acceptability classes for solder joints and assemblies, electrostatic discharge control programmes, and statistical sampling plans for lot acceptance. Class 1, 2 and 3 define how strict the acceptance criteria are for consumer, service and high-reliability product.

Key points

• Product class (1/2/3) must be agreed with the customer before inspection criteria are set.
• ESD-protected areas require verified wrist straps, grounding and periodic audits.
• First article inspection establishes that the process makes conforming product.
• Sampling plans (AQL) define accept/reject numbers for lot inspection.