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Due to increasing durability requirements driven by engine emission regulations such as Euro 5 and US'07, the reliability of the engine cooling equipment, especially of charge-air-to-air-cooler (CAC), has to be increased as well. Behr is using reliability management in order to meet these requirements. “Reliability” is defined as the fulfillment of quality requirements over the life cycle and under specific application conditions. At Behr, the reliability management is organized as a “House of Reliability” (HOR). The mission profile includes up-to-date customer requirements, loads and statistical experience from the field and helps to create relevant test specifications for the validation testing. Validation is one key element of the HOR. If the test specifications are not connected to the field, the testing will not lead to a reliable product and to customer satisfaction. The process of gathering load collectives for mission profiles is therefore very important.