MTBF (Mean Time Between Failures) is a calculation used to measure the reliability of a product or system. It is calculated by dividing the total number of operating hours of a system by the number of failures that occur during that time. This calculation is important for businesses and manufacturers, as it provides a way to measure the performance of a product or system and to identify areas for improvement. It is also used to determine the expected lifetime of a product or system, as well as the cost of maintenance and repair. MTBF is a useful tool for predicting the reliability of a product or system, and can be used to inform decisions about product design, manufacturing processes, and customer service.