What are the differences between SPI, AOI, and X-ray inspection? How to teach inspection processes to new PCB assembly employees without confusion

When training new employees in PCB assembly,"What is the difference between SPI and AOI?""If we have AOI, is X-ray inspection unnecessary?"These questions often come up.If you just explain the names ...
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AOI system from YESTech performs tabletop PCB inspection

Using a standard package library to simplify training and ensure program portability across manufacturing lines, YESTech’s B2 benchtop automated optical inspection system for post-reflow PCBs inspects ...