The solution illustrated in the diagram demonstrates how combustion engines in the automotive industry are tested "cold" in the end-of-line area.

Combustion engines are quality-tested directly in the assembly line. In cold testing as opposed to hot testing, the engine is not powered by fuel but electrically, which allows for more eco-friendly testing. On completion of the leak test, the engine is filled with oil and, if required, with fuel. The cold test results will show whether the engine complies with quality requirements.

The challenge in this case is to identify any asymmetry or deviation in relation to a stored reference engine.