End of Line Test (EOL Test)
Inspection tasks at the end of the manufacturing line

What is an end of line test (EOL test)?

The term end of line test (EOL test) refers to quality control tasks which are executed at the end of a production line. EOL tests usually focus on evaluating the correct functioning of the device under test (sometimes under varying environmental conditions). However, additional inspection tasks like checking labelling processes (e. g. barcodes) can be performed as well.

In-circuit testing (ICT) refers to a number of physical (electrical) tests which can detect structural defects of electronic devices. Sub tests include short-circuit testing, resistance measurement, capacitance measurement and can identify manufacturing faults like conductor path, soldering or press-in errors. In-circuit tests can be performed right after relevant production steps or as an end of line test.

Printed circuit board (PCB) ready for an end of line test (EOL test)

Printed circuit board (PCB) in a test adapter ready for in-circuit testing

EOL test equipment: Guardian FCT tester

Guardian FCT tester with connected test adapter of the series PA450

During functional testing (FCT), a device under test (DUT) is exposed to different external influences which are relevant for its intended application (e. g. digital input signals, interaction with sensors, environmental conditions). A precise FCT tester (e. g. our Guardian FCT tester) evaluates in real time if the reactions of the DUT to these influences are correct. The connection between the DUT and the FCT tester is established using specialised test adapters (for example test adapters by GTS Test Solutions).

Automated optical inspections (AOI) are another test method frequently performed at EOL test benches. Image processing algorithms can evaluate if components have been correctly assembled and aligned. Moreover, AOI systems are used to check if labels have been accurately posted (e. g. CE label). A compact yet powerful solution for AOI is our Sentry.

End of line test equipment: Sentry AOI tester

Sentry AOI tester with opened drawer

Do you need help with EOL testing?

Our competent and creative team gladly provides help and advice. Besides our in-house software and hardware for end of line tests, we offer integration services and turnkey test benches. We are looking forward to your contact enquiry!