Cold test is defined as a set of procedures required to test the dynamic, electrical or fluids performances of the engine without being started. Such procedures are needed to verify the proper execution of the engine assembly process by attesting its conformity with the next assembly steps.

The short duration of the cold test (about two minutes) allows a considerable reduction of the production time and a consequent increase in performance and productivity. In so doing, the total costs of the production chain are reduced accordingly.