Automated optical inspection


During automated optical inspection (AOI), printed circuit boards (PCB) or surface-mount devices (SMD) are inspected by means of an automated optical inspection machine. During each automated optical inspection test, dozens of images are captured with a special camera and compared to previous assembled boards to detect any anomalies.

Alternative labels

PCB inspection
optical inspection which is automated
SMD inspection
inspection of SMD

Skill type


Skill reusability level


Relationships with occupations

Essential knowledge

Automated optical inspection is an essential knowledge of the following occupations:

Automated optical inspection operator: Automated optical inspection operators (AOI operators) operate automated optical inspection machines to inspect assembled printed circuit boards. They read blueprints and inspect the finished or in-process PCB assemblies for flaws or defects.

Optional knowledge

Automated optical inspection is optional for these occupations. This means knowing this knowledge may be an asset for career advancement if you are in one of these occupations.

Printed circuit board test technician: Printed circuit board test technicians inspect and test printed circuit boards. They perform a range of printed circuit board testing procedures and may perform minor repairs.




  1. Automated optical inspection – ESCO


Last updated on September 20, 2022