End of Line (EOL) test solutions test the products produced in different ways. By measuring, visual inspection and functional verification. Some examples of test methods and characteristics or functions tested in the automotive and consumer electronics industries include:

• Visual testing (e.g. cable shape, length and fitting, or automatic optical colour checking).
• Acoustic/sound testing (e.g. testing loudspeakers or the correct sound of fire alarms).
• Testing of electrical functions (e.g. checking the functionality of electronic control units, mobile phones, etc.).
• Mechanical testing (e.g. vehicle engine torque testing).
• Leak testing (e.g. testing the turbo housing gasket).

EOL does not mean a test method as such. It means a place where 100% of products are tested in real time against predefined functions and characteristics at the end of the production line. A successful EOL testing platform, on or off the line, is also critical from a financial perspective, as properly testing products protects the customer from high potential losses. At the same time, it's good to remember that 100% testing doesn't pay off for everyone - for some, it's better to risk a complaint and then replace piece for piece. In automotive manufacturing with high NOK part penalties, 100% testing is a necessity to avoid these penalties.

Modern EOL systems are a major part of quality control and should meet the following parameters:

• They meet specific industry standards.
• They are selected and designed to test exactly what the customer needs.
• They are modular and can be upgraded.
• Have access control with user management (logs changes and is password protected or otherwise secure).
• Reliable (the measurement capability is reliable and the diagnostic system reliably warns of internal faults or problems).
• They are as fast as possible (the test cycle time is short, according to the actual technological possibilities).

Most EOL solutions are custom-made or existing solutions are adapted to the customer's needs.