Mean Time Between Failures (MTBF) is a key performance metric used to measure the reliability of a system or component. It represents the average time elapsed between one failure and the next during normal operation. MTBF is typically expressed in hours and helps organizations predict maintenance needs and improve system design. Calculating MTBF involves dividing the total operational time by the number of failures that occur within that period. This metric is crucial for industries such as manufacturing and information technology, where minimizing downtime is essential for efficiency and productivity.